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

Get ready for a thrilling twist in the Marvel Cinematic Universe: Oscar Isaac might be reprising his role as Moon Knight in the highly anticipated Avengers: Doomsday. Yes, you read that right! While it's still a theory, recent developments are making it seem increasingly plausible.

Over the weekend, Star Wars Celebration's official social media announced that Isaac would no longer attend the convention in Japan due to changes in his production schedule. This news sparked a frenzy among fans, especially after Daisy Ridley's announcement at Star Wars Celebration 2023 about her return to the Star Wars franchise. Could Isaac be hinting at something similar?

Although the specifics of Isaac's schedule changes were not disclosed, fans quickly connected the dots to Avengers: Doomsday, which is currently being filmed in London. Social media buzzed 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

While the theory remains unconfirmed, Marvel is known for its surprises. Although Isaac wasn't included in the initial cast reveal for Doomsday, Marvel Studios producer Kevin Feige hinted that not all cast members were disclosed during the livestream. "We revealed many, not all," Feige stated during a video call at CinemaCon, leaving room for speculation.

Isaac previously starred as Moon Knight in a six-episode series released in 2022, but Marvel has yet to announce a follow-up. Avengers: Doomsday is scheduled to premiere on May 1, 2026, promising an epic ensemble of returning heroes and new faces.

In other MCU news, fans have been buzzing about Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding yet another layer of intrigue to the MCU's ever-expanding universe.

The cast reveal for Avengers: Doomsday last month highlighted a significant presence of veteran X-Men actors, including Kelsey Grammer (Beast), Patrick Stewart (Charles Xavier/Professor X), Ian McKellen (Magneto), Alan Cumming (Nightcrawler), Rebecca Romijn (Mystique), and James Marsden (Cyclops). This lineup has led fans to wonder: is Avengers: Doomsday secretly an Avengers vs. X-Men movie? With Grammer already making his MCU debut in The Marvels' post-credits scene and Stewart appearing in Doctor Strange in the Multiverse of Madness, the stage is set for an epic crossover.