Sebastian Stan Reveals What It Was Really Like Returning for ‘Avengers: Doomsday’

Few actors have spent as long inside the Marvel machine as Sebastian Stan. He has played Bucky Barnes/Winter Soldier since ‘Captain America: The First Avenger’ and has carried the role through ‘The Winter Soldier,’ ‘Civil War,’ ‘Infinity War,’ ‘Endgame’ and beyond. That is a lot of years spent in the same corner of the same universe.

Now the franchise is gathering its heroes again. ‘Avengers: Doomsday’ is set to arrive on Dec. 18, 2026, directed by Anthony and Joe Russo, the duo behind ‘Infinity War’ and ‘Endgame.’ The cast is enormous, with Robert Downey Jr. back as the villain Doctor Doom, Chris Evans returning to the fold, and a long list of newer faces like Florence Pugh, Pedro Pascal and Vanessa Kirby joining the veterans.

That brings us to the latest comment making the rounds. MCU Film News highlighted a remark from Stan, sourced to Radio Times, saying that returning for ‘Avengers: Doomsday’ feels like a “college reunion.” He added that it is “bizarre to return to something with all of these people that I’ve known and grown up with for the last 10 to 15 years,” calling the experience nostalgic and predicting a “very celebratory situation.”

The comparison fits what other people around the production have been saying. Anthony Mackie recently described how, whenever he, Evans and Stan get together, it turns into a laid-back hangout full of jokes and laughter. That sounds a lot like a group of old friends catching up rather than colleagues clocking in.

Stan has leaned on reunion language before. Discussing the Doctor Doom reveal, he described being escorted to a green room area where everyone gathered, turning the day into something like a high school reunion. The college version is the same idea with a few more years of shared history attached.

Still, the nostalgia comes with a caveat. Stan told Decider he hasn’t seen a final cut of ‘Doomsday,’ and he suspects the film will be heartbreaking in a lot of ways. He also said the group has been a family and that it never stops being that way. A celebratory set and a heartbreaking movie are not mutually exclusive, which is part of what makes his comments so intriguing.

Part of that uncertainty comes from how the film was made. Stan told Le Journal du Dimanche that Marvel shot the movie in scattered scenes without a full script, leaving him with “absolutely no idea” how the story fits together. His co-star Alan Cumming has also admitted that he doesn’t understand the plot of the movie. If the cast is guessing, the audience has little hope of cracking it early.

That secrecy has stoked plenty of fan anxiety about Bucky’s fate. Some fans worried that Stan’s busy schedule, including a role as Harvey Dent in ‘The Batman Part II,’ could mean his Marvel run is ending in ‘Doomsday.’ The Wrap noted, however, that his cryptic remarks probably have more to do with the missing script than with any hidden spoiler.

There is also a clear strategy behind the reunion energy. Marvel has been leaning into nostalgic appeal and a “return to the origins” feel, in the vein of ‘Spider-Man: No Way Home,’ to win back longtime fans. Stan’s comments suggest that the warmth inside the cast is real, even if the strategy is calculated.

For viewers who grew up alongside the Infinity Saga, the idea of a cast that has aged and grown together is part of the appeal. The Russos are bringing back familiar faces, and Stan’s description makes the set sound more like a homecoming than a blockbuster shoot. Whether the movie delivers the same warmth on screen is the question that remains.

With the release date about 5 weeks away, the mystery around Bucky, Steve and the rest of the returning heroes will only get louder. For now, Stan has offered a glimpse of the mood behind the scenes: friendly, sentimental and a little emotional. The tears, if his prediction holds, may come later.