Oscar Isaac Exits Star Wars Event, MCU Fans Speculate Moon Knight in Avengers: Doomsday

Hold onto your seats, Marvel fans—Oscar Isaac might just be donning the Moon Knight suit once again, and this time it could be for the highly anticipated Avengers: Doomsday. While it's still in the realm of speculation, recent developments are stirring the pot and making this theory seem increasingly plausible.

Over the weekend, Star Wars Celebration's official social media dropped a bombshell: Isaac would no longer be attending the beloved convention in Japan this year due to "changes in his production schedule." This announcement, made back in February, had initially sparked rumors of Poe Dameron's return to the galaxy far, far away, especially after Daisy Ridley announced her return to the Star Wars franchise at Star Wars Celebration 2023. Fans were left wondering if Isaac might follow suit with a similar announcement.

While the specifics of Isaac's production schedule changes remain under wraps, the fact that Avengers: Doomsday is currently in production in London has led fans to connect the dots. Social media erupted with speculation:

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

Despite the excitement, it's important to remember that this is still just a theory. Marvel is known for its surprises, and while Isaac wasn't included in the initial Doomsday cast reveal, Marvel Studios producer Kevin Feige hinted at more to come. During a video call at CinemaCon, Feige stated, "We revealed many, not all," leaving room for speculation and hope among fans.

Isaac previously starred in the six-episode season of Moon Knight released in 2022, but Marvel has yet to announce a follow-up. Avengers: Doomsday is slated to hit theaters on May 1, 2026, promising a lineup of returning heroes and new faces as showcased in the epic livestream.

Meanwhile, MCU enthusiasts are also buzzing about Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding another layer of intrigue to the Marvel universe.

Last month's Avengers: Doomsday cast reveal was packed with veteran X-Men actors, confirming the X-Men's significant role in the film. Kelsey Grammer, who played Beast in the Fox X-Men franchise and made his MCU debut in The Marvels' post-credits scene, is joined by Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden. Stewart, known for his role as Charles Xavier/Professor X, appeared briefly in the MCU via Doctor Strange in the Multiverse of Madness as a member of the Illuminati. McKellen, who portrayed Magneto, along with Cumming (Nightcrawler), Romijn (Mystique), and Marsden (Cyclops), are yet to make their MCU debut. This lineup raises an intriguing question: is Avengers: Doomsday secretly an Avengers vs. X-Men movie?