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

Rumors are swirling that Oscar Isaac might be reprising his role as Moon Knight in the upcoming Marvel blockbuster, Avengers: Doomsday. This speculation gained traction after Star Wars Celebration announced that Isaac would not be attending their event in Japan due to changes in his production schedule. Originally set to make an appearance, fans were left wondering what could have shifted his commitments, especially after Daisy Ridley's announcement at Star Wars Celebration 2023 about her involvement in a new Star Wars film.

While Isaac's new scheduling conflicts were not specified, the fact that Avengers: Doomsday is currently filming in London led many to connect the dots, suggesting Moon Knight's potential inclusion in the superhero ensemble. Social media buzzed with excitement and 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

Although this theory is still unconfirmed, Marvel Studios has a history of keeping surprises up their sleeve. Notably, Oscar Isaac was not listed among the cast members revealed for Avengers: Doomsday. However, Marvel Studios producer Kevin Feige hinted at more announcements to come, stating at CinemaCon, "We revealed many, not all," leaving room for speculation and hope among fans.

Isaac previously starred in the six-episode series Moon Knight in 2022, but no sequel has been officially announced yet. Avengers: Doomsday is slated to premiere on May 1, 2026, promising a lineup of returning heroes and new faces as showcased in their recent livestream.

In other Marvel news, fans have been intrigued by Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding another layer of mystery and excitement to the MCU's future.

The cast reveal for Avengers: Doomsday last month spotlighted several veteran actors from the X-Men franchise, including Kelsey Grammer as Beast, Patrick Stewart as Professor X, Ian McKellen as Magneto, Alan Cumming as Nightcrawler, Rebecca Romijn as Mystique, and James Marsden as Cyclops. This has sparked discussions about whether Avengers: Doomsday could be setting up an Avengers vs. X-Men storyline. Grammer and Stewart have already made their MCU debuts, while the others are set to join the universe, potentially hinting at a larger crossover event.