• "Avengers: Infinity War" left us with a lot of questions , including whether or not we'll see the characters who vanished come back.
  • INSIDER rounds up the burning questions we hope "Endgame" will answer.

" Avengers: Endgame " is in theaters Friday, April 26, and you probably have one main question on your mind.How are our heroes going to undo Thanos' devastating snap which wiped out half of the universe from existence?

But we're hoping it will answer many more questions left unanswered from previous Marvel movies.After all, "Avengers: Endgame" is the culmination of more than a decade of films in the Marvel Cinematic Universe.

Has Bruce Banner figured out what's going on with the Hulk? What happened to Sharon Carter? And what about Valkyrie? And is Tony ever going to get married to Pepper?

INSIDER has been going through the 21 movies in the MCU and rounded up the questions both major and minor that we hope are addressed in the three-hour long "Endgame."

Are the characters who vanished really gone or can they be brought back?

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Courtesy Columbia Pictures

This is the biggest question from "Infinity War." Will the remaining heroes be able to undo the Mad Titan's life-altering snap? We certainly hope so. After all, Doctor Strange did tell Tony Stark that giving Thanos the time stone was, presumably, the only way to save humanity.

Also, it's kind of tough to imagine that there's a " Guardians of the Galaxy Vol. 3 " without the majority of the group's members. We've also seen a very much alive Tom Holland in the trailer for this summer's "Spider-Man: Far From Home."

Disney just announced that Wanda, Vision, Falcon, Bucky Barnes, and Loki characters who were all killed or lost in "Infinity War" will be getting their own shows on the company's upcoming streaming service, Disney Plus . Who's Marvel fooling? We'd be surprised if most of the heroes who vanished (if not all of them) don't return at some point in "Endgame."

Read more: Where every major Marvel character is after the "Avengers: Infinity War" snap

How are the Avengers going to try and bring everyone back are they time traveling?

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It's been heavily speculated time travel will be a part of "Endgame" due in part to paparazzi set photos from filming that showed Ant-Man with Iron Man back during the events of "The Avengers ."

That theory sounds more convincing after seeing the first set of official "Endgame" toys from Marvel and Hasbro. The action figures wearing new Avengers' suits are fitted with a small blue device on their hands . We're betting those gadgets (and new suits) are going to help the Avengers travel back in time to undo the events of Thanos' life-altering snap at the end of "Infinity War."

Read more: How time travel could play a part in "Avengers: Endgame"

Is the group going to revisit Project Pegasus? "Captain Marvel" made the secret program seem extremely important. She and Tony Stark may hold the keys to it.

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A lot of "Captain Marvel" is spent telling viewers about Project Pegasus, aka P.E.G.A.S.U.S. (Potential Energy Group/Alternate Sources/United States). Wendy Lawson was trying to figure out how to harness the energy of the Tesseract the cube which held the blue Infinity stone to create a light-speed engine.

Read more: Our guide on the Infinity Stones and what you need to know about them

If you revisit the first few minutes of "The Avengers," Nick Fury, Dr. Erik Selvig (Stellan Skarsgrd), and Clint Barton/Hawkeye are working on Project Pegasus and are trying to unlock its capabilities.

There's another important moment where Project Pegasus may have been referenced in the MCU. Revisit the scene where Fury is speaking to Tony Stark about his father. Fury says Stark's father, Howard, was working on something huge that would've changed the course of history. Tony later winds up making a new element to help himself stay alive. However, I think Fury may have been speaking about Pegasus.

Stark also worked on the secret project where he studied the Tesseract, but couldn't crack it. What better way to honor Lawson and Howard Stark than by having Carol Danvers/Captain Marvel and Tony finish the work started years ago by building the light-speed engine.

That may just enable them, in part, to travel back in time. If you're still unsure, Project Pegasus is also the name of an apparent real-life CIA project that was involved in looking into teleportation and time travel .

How will Tony and Nebula get home from space?

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The newer trailers for the film confirmed we'll see Tony make his way back to Earth , but how will he and Nebula return? Things looked pretty dire for Stark in the first trailer for the film .

We bet, at his lowest, Stark will remember the events of the first "Iron Man," when he was imprisoned by terrorists. Back then, Stark built an Iron Man suit so he could escape and make his way home with the help of Dr. Yinsen. This time around, he has the help of Nebula and the teasers hint at the two working together to build their way out of another impossible situation.

How will Ant-Man get out of the Quantum Realm?

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Everyone Scott Lang/Ant-Man was with at the end of "Ant-Man and the Wasp" vanished as he was inside the Quantum Realm. Does Lang have a fail safe to get out of there on his own if no one's around or will his friend Luis show up to save the day?

We're not even sure if Luis survived Thanos' snap or if he knows how to operate the Quantum Realm tech. Regardless, we know Lang will get out of the Quantum Realm because we see him outside of, presumably, the Avengers compound in the trailers .

Read more: The only six Marvel movies you need to watch before "Avengers: Endgame"

Did Hawkeye's family vanish in the "Infinity War" snap?

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Multiple trailers and toys have shown Clint Barton/Hawkeye in the Ronin persona, a Japanese word for lone samurai. It's a role Barton briefly took on in the comics before taking up the Hawkeye mantle again.

If you're wondering why Hawkeye has new superhero gear in "Endgame," we're guessing he was also affected by Thanos' life-changing snap at the end of "Avengers: Infinity War."

We briefly see Hawkeye happy in the newest "Endgame" trailer with his family before the image is juxtaposed with a somber Clint Barton in the rain dressed in the Ronin suit. If Hawkeye's family vanished right before him , it could've sent him into a downward spiral and pushed him to become Ronin. Barton retired from the Avengers so he could spend more time with his wife and kids.

Read more: Hawkeye's daughter may be a beloved character from Marvel comics

What will Captain America and Iron Man's reunion be like?

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The last time Captain America and Iron Man were in a room together, Cap nearly beat Tony Stark within an inch of his life. That was after Tony learned that Bucky Barnes (Cap's best bud) killed his parents while brainwashed. Are you keeping up? That's not even the worst part.

Cap knew about Bucky's secret and kept it from Tony.Talk about drama.

Since then, Cap and Iron Man have been on the outs. But there's nothing like half of the world getting vanquished in the blink of an eye to bring old pals back together.

Read more: Why Iron Man had an old flip phone in "Infinity War"

Where did Thanos go at the end of "Infinity War"?

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Co-director, Joe Russo, confirmed Thanos isn't in the soul stone or anything else like that. He and his co-director brother Anthony Russo told Uproxx Thanos was chilling on a new planet enjoying his victory .

Is the Infinity Gauntlet broken or can it be used to turn back time?

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After Thanos snapped his fingers at the end of "Infinity War," it looked like some severe damage was done to the Infinity Gauntlet. Thanos was able to use the space stone to escape Thor; however, we're not sure how the rest of the stones are holding up or if the gauntlet is in disarray. Maybe this was a one-time use sort of deal.

And if the gauntlet is broken would someone still be able to use the time stone? We know Wong survived the end of "Infinity War."

If Eitri survived the Snap, can he make the Avengers another Infinity Gauntlet?

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If Thanos' gauntlet is busted and they need one to wield the power of the Infinity Stones, can't they just make another one? One problem is that we don't know whether or not Eitri is alive.

Are Bruce Banner and the Hulk going to work through their differences?

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Courtesy of Hasbro, composite by Kirsten Acuna/INSIDER

Though we haven't seen the the Hulk appear in any "Endgame" teasers or trailers, he's among the first wave of toys for the film . We have to say Hulk is looking a little more trim. If we're going to see the big green guy, it most likely means he and Bruce Banner (Mark Ruffalo) aren't completely at odds anymore.

In "Infinity War," the Hulk refused to come out to fight and help Banner during the battle in Wakanda. In the film's commentary, director Joe Russo said the Hulk is tired of only playing the hero for Banner .

"We thought an interesting direction to take him in is: Well, what if Banner, who typically uses the Hulk to solve crisis situations what if the Hulk were no longer interested in solving those problems for Banner? The relationship is becoming increasingly dysfunctional," said Russo.

Read more: Could we be seeing a version of Professor Hulk in "Endgame"?

What happened to General Ross and S.H.I.E.L.D. after the Snap?

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If you don't recognize the name General Ross, you know him. He's actually one of the longest members of the MCU, having appeared in "The Incredible Hulk." In "Captain America: Civil War," he was the one who told the Avengers they needed to sign the Sokovia Accords, which required all superheroes to out themselves to the public and register with the government.

The last time we saw Ross was during a hologram call with Rhodey (Don Cheadle) before wanted fugitive Captain America arrived at Avengers HQ.

As for S.H.I.E.L.D., we're not even sure if it's still operating after the Decimation. At the very end of "Infinity War,"Fury told Maria Hill to "call control" and tell them there was a code red before they both vanished into thin air .

Can and will Vision be fixed?

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Vision didn't disappear with the fallen Avengers because he's a droid. He just had the mind stone that made him sentient ripped out of his head. Tony Stark can fix that once he returns to Earth, right? Maybe not completely. But it would be surprising if Stark can't put Vision back together somehow. He was able to fix Jarvis after Ultron scrambled his code in "Age of Ultron" to build Vision.

Hopefully, Shuri backed up some of Vision's data somewhere before apparently vanishing with the rest .

Read more: A new 'Avengers: Endgame' poster appears to confirm that a beloved character didn't survive Thanos' snap, and fans are devastated

Will we see Tony Stark's "Age of Ultron" vision come to fruition with the dead Avengers surrounding him?

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At the start of "Age of Ultron," Wanda Maximoff aka Scarlet Witch, makes Tony have a vision that unsettles both him and the young woman.

In it, he sees himself standing over a pile of the original Avengers , dead in space. It looks like they're somewhere similar to where Ronan (from "Guardians of the Galaxy"/"Captain Marvel") speaks with Thanos in "GotG." Tony watches asthe Chitauri aliens from "The Avengers" travel through a wormhole to Earth.

Some of the other visions the Scarlet Witch made Thor, Captain America, and Black Widow see contained desires, nightmares from their pasts, and one hint at things to come. Thor saw his friend Heimdall say he was going to drag them all to Hel. As we later learned in "Thor: Ragnarok," the God of Thunder's sister, Hela, was banished to Hel until she escaped following Odin's death.

Thor's vision had some truth to it. Could the same be said for Tony's?

Where is Valkyrie and the rest of the surviving Asgardians?

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We know Valkyrie survived the end of "Infinity War." Co-director Joe Russo previously said she survived the Snap during a Q&A following the movie's release.

Did Valkyrie take the remaining Asgardians and escape before Thanos could light up the entire ship they were traveling on at the end of "Thor: Ragnarok"? If so, where did she take them? My best guess is that they may be back on Sakaar with the Grandmaster.

We'll sure we'll get some answers since Valkyrie is featured in one of 32 character posters released for "Endgame."

Will we see more of Korg and Miek?

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We're not sure what became of the two standout characters from "Thor: Ragnarok" after the events of "Infinity War," but we're hoping to see them in "Endgame." Marvel debuted 40 emoji for the film on Twitter and the duo were among the many emoji available while a more prominent character, The Vision, was nowhere to be found.

"Ragnarok" director Taika Waititi voiced Korg and did motion-capture for the character. According to my colleague Jason Guerrasio on our sister site Business Insider , Chris Hemsworth loved the character so much Waititi decided to add more of him into the film.

Read more: How Korg became a scene stealer in "Thor: Ragnarok"

Is the Collector actually dead or was it a fake out?

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We know Thanos retrieved the red reality stone from the Collector's place on Nowhere, but we never saw how it really went down. We saw the reality Thanos created to show the Guardians of the Galaxy when they arrived on Nowhere.

It's easy to assume the Collector was killed. However, we didn't see his body. And if there's no body, then anything goes. Since the Collector is one of the oldest living beings in the universe, that would be a pretty big loss.

It would also be a huge bummer if Marvel killed off the Collector before he can be seen on screen with his figurative brother , The Grandmaster (Jeff Goldblum).

Speaking of The Grandmaster, is he OK?

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Jeff Goldblum's kooky Grandmaster, a man obsessed with games, became an instant fan-favorite in the Marvel Cinematic Universe and we will simply not accept if he didn't survive the Decimation.

Is Tony Stark making a Hulkbuster-like suit for his buddy Rhodey?

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Courtesy LEGO

An "Endgame" Lego set is centered around a suit called the War Machine Buster. If we see this suit on screen, it likely means that Tony Stark made his buddy Rhodey a suit similar to the Hulkbuster one.

As a reminder, Rhodey was partially paralyzed in "Captain America: Civil War." Though he's walking thanks to some new tech, we bet Stark wants to make sure his friend is extra secure during any more battles.

You can find the LEGO set here .

What will Stan Lee's final cameo be?

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Co-director Joe Russo told Mashable "Endgame" is Stan Lee's final cameo " committed to film ."

"We have all these movie stars on that set, and when Stan came to set, everybody would be like kids again," Russo told Mashable. "It was always a lot of fun shooting these cameos because he was very charming, and he would maybe get the crew going, and everybody would be laughing and having a good time."

Read more: Revisit all of Stan Lee's Marvel cameos

Is Tony Stark going to avenge the death of Charlie Spencer in Sokovia?

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In "Captain America: Civil War," a mother (played by Alfre Woodard) approaches Stark and tells him her son Charlie was killed by the events of "Avengers: Age of Ultron" when the billionaire's robot went haywire.

Tony was pretty torn up about what Charlie's mother had to say. He was so torn up that he decided to sign the Sokovia Accords to work as a hero for hire under the government's control. When Tony thinks back on all of the people who have been lost because of the Avengers, he may also consider the life of Charlie. This movie is about avenging the fallen after all, right?

Will we see a grown-up Harley from "Iron Man 3"?

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In "Iron Man 3," Stark started having panic attacks and nightmares after the Battle of New York in "Marvel's The Avengers."Harley was the little boy who helped Stark work through some of his PTSD about the wormhole and his near-death experience.

Don't be surprised if Stark has a similar breakdown when he returns back to Earth in "Endgame" after losing Spider-Man and learning who else may have been lost in Thanos' decimation. If Stark snaps, we expect him to bounce back quickly. But how?

Tony could recall Harley's advice to focus on his ability to build something instead of worrying about something that's out of his control.

What happened to Sharon Carter and will Captain America see her again?

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In "Captain America: Civil War" Carter and Steve Rogers started getting cozy after her aunt Peggy's funeral. Then Steve went on the run and we haven't seen or heard from Sharon since. We don't even know if she survived the snap.

Carter was in early drafts of "Infinity War" that were trimmed out to better serve the larger story.

"If you're writing scenes that set up people before the story has gotten to them such as Steve and Sharon trying to make it work in an apartment, they're gonna go because the movie does not have time to catch up 'previously on the life of Steve Rogers,'" " Infinity War" writer Stephen McFeely told Collider .

"Once it became sort of a smash-and-grab type movie, anything that wasn't on the main A plot about and in response to Thanos collecting stones mostly got jettisoned," McFeely added.

Maybe Rogers will reunite with Carter in "Endgame" or learn she disappeared along with Bucky and Sam Wilson.

Are we ever going to see Tony and Pepper get married?

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Tony Stark and Pepper Potts were engaged at the start of "Infinity War." We have some serious trepidation over whether or not Stark will be able to save the world and have a family.

And is Wong going to attend that wedding? Tony gave him an invite at the start of "Infinity War" for saving his life.

Is Pepper Potts pregnant or will she and Tony have a child?

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At the start of "Infinity War," Tony tells Pepper he had a very vivid dream that they had a child named after her eccentric uncle, Morgan.

It was a nice nod to Tony's cousin of the same name in the comics. Morgan was a constant source of frustration for Tony as he constantly tried to swipe Stark Industries from him . Perhaps it was also a subtle nod of a future baby Stark.

Is Pepper going to suit up in "Endgame"?

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During an appearance on "The Late Show With Stephen Colbert" in 2018 , Gwyneth Paltrow said she would be in "Avengers: Endgame" and hinted we may see her in some sort of suit.

Colbert asked her if at any time while filming if she "thrusted her hand toward someone wearing a blue suit with ping pong balls glued on." Paltrow said yes. We certainly didn't see that in "Infinity War."

In October 2018, a leaked photo from the upcoming sequel first shared on Instagram showed Paltrow suited up in an Iron Man-like suit against a green screen.Fans think we may see Potts wear the iconic R.E.S.C.U.E. suit, which Tony builds for Pepper.

Read more: A leaked 'Avengers 4' photo teases Gwyneth Paltrow in an iconic superhero suit

Will Drax get to avenge his family and kill Thanos?

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If the Avengers are successful in bringing all of the fallen heroes back, we'd love to see Drax get another moment with Thanos on-screen. In "Guardians of the Galaxy," he recalls how Thanos murdered both his wife and child.

Will we see the Red Skull again?

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If the Avengers have to go back in time and scramble to try and retrieve all of the Infinity Stones before Thanos ever could, that means they would need to travel to Vormir where the orange soul stone is held.

In "Infinity War," we learned the Red Skull was banished there to be the keeper of the soul stone. Maybe we'll see him again.

Read more: A 'Walking Dead' actor had a surprise role in 'Avengers: Infinity War' and you probably didn't even realize it

What was the one vision Doctor Strange saw where the Avengers beat Thanos?

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And will that vision be the eventual outcome of "Avengers: Endgame"?

Strange says he saw 14,000,605 possible outcomes for their fight with Thanos. Out of them all, there was only one reality where they won.

Did Strange put that plan into action by giving Thanos the time stone and allowing half of the universe to die? Right before he vanishes, Strange tells Tony "there was no other way," so hopefully they're on the right path.

Are we going to see Crossbones again?

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According to The Hollywood Reporter , actor Frank Grillo, who has played the Captain America villain, confirmed on the UHC Unfiltered podcast that Crossbones/Brock Rumlow would appear in "Endgame" in a flashback.

Don't get your hopes up about seeing a lot more of Crossbones in the MCU, though. Grillo said he's done doing Marvel movies.

And, most importantly, will Adam Warlock show up?

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In the 1991 comic "The Infinity Gauntlet," Adam Warlock leads a team against Thanos after half the world's population starts vanishing.

There's just one problem. We haven't seen Adam yet in the Marvel Cinematic Universe in the flesh anyway. Adam was teased at the end of "Guardians of the Galaxy Vol. 2." During an end-credits scene, one of the villains, Ayesha, is hovering over a chamber housing, what she refers to as, "the next step in our evolution."

Ayesha says she'll call him Adam. "GotG Vol. 2" director James Gunn told Slashfilm Warlock was originally supposed to have a larger role in the movie. If we don't see Adam in "Endgame," we expect him to play a role in the MCU's next phase.

You can read more on Adam Warlock here .

Is everyone going to make it out of this movie alive, and, if not, which characters are going to die?

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The movie teasers have us extremely concerned for all of our heroes. One of the short teasers has the original Avengers say they would go to whatever lengths to try and bring their friends back, with all of them repeating the quote, "Whatever it takes."

They can't all live, right?

What about Thanos? Is he going to make it out of this movie alive?

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Will Thor aim for the head this time if he meets up with Thanos again? Will Nebula seek out revenge on the father who tortured her and killed her sister?

It feels a bit too obvious and easy to kill off Thanos.The villains never really die, right? One argument to kill Thanos would be because of Disney's Fox acquisition. Disney now owns the rights to the "Deadpool" franchise in which Thanos actor Josh Brolin also plays the anti-hero Cable. Can Brolin continue playing two Marvel characters simultaneously?