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

Rumors are swirling that Oscar Isaac might reprise his role as Moon Knight in the upcoming Avengers: Doomsday. While this theory might seem far-fetched, recent developments have given it some credence. Over the weekend, Star Wars Celebration announced that Isaac would no longer be attending the convention in Japan due to changes in his production schedule. This announcement, initially hinting at a potential return to the Star Wars universe as Poe Dameron, has now sparked speculation about his involvement in Avengers: Doomsday, currently in production in London.

Fans quickly connected the dots between Isaac's scheduling conflict and the ongoing filming of Avengers: Doomsday. 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

While the idea of Isaac returning as Moon Knight remains speculative, Marvel Studios producer Kevin Feige hinted at more surprises. During a video call at CinemaCon, Feige revealed that the cast announcement for Doomsday did not include every actor involved, saying, "We revealed many, not all." This statement has kept the door open for fans to dream about Isaac's potential involvement.

Isaac previously starred in the six-episode Moon Knight series released in 2022, but Marvel has not yet announced any follow-up projects. Avengers: Doomsday is slated for release on May 1, 2026, and promises to bring back a host of familiar faces and heroes, as showcased in the epic livestream.

In other MCU news, fans are also buzzing about Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding to the excitement and speculation about future projects.

Last month's cast reveal for Avengers: Doomsday was heavy on veteran X-Men actors. Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden are all set to appear, confirming a significant presence of the X-Men in the film. Grammer, who played Beast in the Fox X-Men franchise, made his MCU debut in The Marvels' post-credits scene. Stewart, known for his role as Charles Xavier/Professor X, appeared briefly in the MCU in Doctor Strange in the Multiverse of Madness as a member of the Illuminati. McKellen, Cumming, Romijn, and Marsden have yet to appear in the MCU. This lineup raises intriguing questions about the film's plot: is Avengers: Doomsday secretly an Avengers vs. X-Men movie?