Oscar Isaac Exits Star Wars Event, Sparks MCU Moon Knight Avengers Rumors

Rumors are swirling that Oscar Isaac might be reprising his role as Moon Knight in the upcoming film Avengers: Doomsday. This speculation gained traction after Isaac canceled his scheduled appearance at the Star Wars Celebration in Japan due to changes in his production schedule. Initially, fans were excited about the possibility of seeing Isaac return as Poe Dameron in the Star Wars universe, especially after Daisy Ridley announced her involvement in a new Star Wars film at the 2023 Celebration.

Although the specifics of Isaac's new commitments were not disclosed, the fact that Avengers: Doomsday is currently being filmed in London has fueled speculation that he might be joining the cast as Moon Knight. Social media has been abuzz with fans piecing together the clues, suggesting a potential role for Isaac in the blockbuster.

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

While the theory remains unconfirmed, it's worth noting that Isaac was not included in the initial cast announcement for Avengers: Doomsday. However, Marvel Studios producer Kevin Feige hinted that not all cast members were revealed during the livestream, leaving room for surprises. Isaac previously starred as Moon Knight in a six-episode series released in 2022, and there has been no official word on a follow-up.

Avengers: Doomsday is slated to premiere on May 1, 2026, promising an epic ensemble of returning heroes and new faces as showcased in the recent livestream.

Meanwhile, MCU fans have also been intrigued by Robert Downey Jr.'s recent Doctor Doom-themed birthday party invitation, adding another layer of speculation to the mix.

Last month's cast reveal for Avengers: Doomsday included several veteran X-Men actors, confirming the significant involvement of the X-Men in the film. Notable cast members include Kelsey Grammer as Beast, Patrick Stewart as Charles Xavier/Professor X, Ian McKellen as Magneto, Alan Cumming as Nightcrawler, Rebecca Romijn as Mystique, and James Marsden as Cyclops. Grammer made his MCU debut in The Marvels' post-credits scene, while Stewart appeared briefly in Doctor Strange in the Multiverse of Madness as a member of the Illuminati. McKellen, Cumming, Romijn, and Marsden have yet to make their MCU debuts. This raises the intriguing question: is Avengers: Doomsday secretly an Avengers vs. X-Men movie?