WARNING: The following article contains spoilers for Avengers: Endgame, in theaters now.
At the end of the Endgame, Steve Rogers travels back in time to seemingly live a life with Peggy Carter. However, this made a lot of fans wonder just what the rules surrounding the movie's time travel were and which universe he'd ended up in. Even the creative team behind Endgame seems to disagree on the film's time travel rules.
Christopher Markus, who co-wrote the film, explained his views on the ending to Fandango, saying, "We are not experts on time travel, but the Ancient One specifically states that when you take an Infinity Stone out of a timeline it creates a new timeline. So Steve going back and just being there would not create a new timeline. So I reject the 'Steve is in an alternate reality' theory."
Markus went on to explain that there wouldn't be much chance of the Steves running into each other, since one of them would've been frozen in ice for a large portion of time.
Markus' statement contradicts what Joe and Anthony Russo said in an earlier interview with Slashfilm. “The time travel in this movie created an alternate reality. He lived a completely different life in that world. We don’t know how exactly his life turned out, but I’d like to believe he still helped many others when they were needed in that world.”
Directed by Joe and Anthony Russo, Avengers: Endgame stars Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Mark Ruffalo as Bruce Banner, Chris Hemsworth as Thor, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Brie Larson as Captain Marvel, Paul Rudd as Ant-Man, Don Cheadle as War Machine, Karen Gillan as Nebula, Danai Gurira as Okoye and Bradley Cooper as Rocket, with Gwyneth Paltrow Pepper Potts, Jon Favreau as Happy Hogan, Benedict Wong as Wong, Tessa Thompson as Valkyrie and Josh Brolin as Thanos.