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

Hold onto your seats, Marvel fans, because there's a thrilling twist in the saga of the MCU that's got everyone buzzing. Word on the street is that Oscar Isaac might be reprising his role as Moon Knight in the upcoming blockbuster, Avengers: Doomsday. Surprised? You're not alone. This speculation stems from a recent announcement that Isaac had to cancel his much-anticipated appearance at Star Wars Celebration in Japan due to a sudden shift in his production schedule.

Back in February, the announcement of Isaac's participation in Star Wars Celebration sparked widespread excitement, with many fans hoping for news about Poe Dameron's return to the Star Wars universe. This was especially poignant given Daisy Ridley's announcement at Star Wars Celebration 2023 about her role in a new film. However, the sudden change in Isaac's schedule has led to a flurry of speculation, particularly since Avengers: Doomsday is currently in production in London.

While the details of Isaac's new commitments remain under wraps, the internet has been abuzz with theories. Social media users were quick to connect the dots, suggesting that Isaac might be gearing up to join the cast of Avengers: Doomsday as Moon Knight.

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

However, it's important to note that this is still just a theory. While Marvel loves to keep fans on their toes with unexpected surprises, Isaac's name was notably absent from the initial cast reveal for Doomsday. Yet, Marvel Studios producer Kevin Feige hinted at more to come, stating during a CinemaCon video call, "We revealed many, not all," fueling further speculation and hope among fans.

Isaac previously starred in the six-episode series Moon Knight released in 2022, but no sequel has been announced yet. Avengers: Doomsday is slated for release on May 1, 2026, promising an epic ensemble of returning heroes and new faces, as showcased in their recent livestream.

Meanwhile, MCU enthusiasts are also keeping an eye on Robert Downey Jr., whose recent Doctor Doom-themed birthday party invitation has added another layer of intrigue to the unfolding narrative.

Last month's cast reveal for Avengers: Doomsday was particularly notable for its inclusion of veteran actors from the X-Men franchise. Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden are all set to join the film, cementing the X-Men's significant presence in the storyline. Grammer, known for his portrayal of Beast, made his MCU debut in The Marvels' post-credits scene. Stewart, who played Charles Xavier/Professor X, appeared in the MCU in Doctor Strange in the Multiverse of Madness as a member of the Illuminati. Meanwhile, McKellen (Magneto), Cumming (Nightcrawler), Romijn (Mystique), and Marsden (Cyclops) are all set to make their MCU debuts. This raises an intriguing question: is Avengers: Doomsday secretly an Avengers vs. X-Men movie?