Hang on to your seats because this is a wild one... Oscar Isaac might be gearing up to return as Moon Knight, potentially even in Avengers: Doomsday. Surprised? So were we. But a recent development is lending some serious credibility to the rumor.
Earlier this weekend, the official Star Wars Celebration social media accounts announced that Isaac would no longer be attending this year's event in Japan, citing "changes in his production schedule."
Isaac's planned appearance was a major announcement back in February, sparking immediate speculation about Poe Dameron's return. Following Daisy Ridley's 2023 Star Wars Celebration appearance where she announced her new film, fans were anticipating a similar high-profile reveal from Isaac.
While the specifics of Isaac's schedule change weren't provided, fans quickly connected the dots. With Avengers: Doomsday currently in production in London, Moon Knight's involvement suddenly seemed a lot less far-fetched.
He’s gonna be filming doomsday?
— James Young (@YoungJames34) April 4, 2025
Dooooomsday
— G the Gamer (@G_da_Gamer) April 4, 2025
Doomsday
— Taco John (@SWaddict_) April 4, 2025
Of course, this remains firmly in rumor territory for now. Marvel loves a good surprise, but it's worth noting that Isaac's name was absent from the massive Doomsday cast list. However, Marvel Studios' Kevin Feige confirmed that the reveal was not exhaustive—"We revealed many, not all," he stated during a CinemaCon video call—leaving the door wide open for speculation.
Moon Knight debuted with a six-episode season in 2022 starring Isaac, but Marvel has been quiet about a second season. Avengers: Doomsday is scheduled for release on May 1, 2026, bringing together a vast roster of returning heroes as teased in the recent live stream.
In other Marvel intrigue, fans are also scrutinizing Robert Downey Jr.'s recent activities after the Iron Man star sent out Doctor Doom-themed invitations for his upcoming 60th birthday party.
Last month's Doomsday casting reveal was dominated by veteran X-Men actors. Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden are all now confirmed for the film, signaling a massive X-Men presence. Grammer, famous for playing Beast in the Fox franchise, made his official MCU debut in a The Marvels post-credits scene. Stewart previously portrayed Charles Xavier and appeared briefly in Doctor Strange in the Multiverse of Madness as part of the Illuminati. McKellen (Magneto), Cumming (Nightcrawler), Romijn (Mystique), and Marsden (Cyclops) are all making their first MCU appearances. This significant influx raises a compelling question: Could Avengers: Doomsday secretly be an Avengers vs. X-Men adaptation?
