Rumors are swirling that Oscar Isaac might reprise his role as Moon Knight in the upcoming Avengers: Doomsday. The speculation kicked off when Isaac unexpectedly canceled his scheduled appearance at Star Wars Celebration in Japan, citing changes in his production schedule. This sudden shift led fans to connect the dots, especially since Avengers: Doomsday is currently filming in London.
Isaac's absence from the Star Wars event, initially announced back in February, had sparked hopes of a Poe Dameron comeback. However, the actor's withdrawal and the timing of Avengers: Doomsday production have fueled the Moon Knight theory. Social media buzzed with comments like "He’s gonna be filming Doomsday?" and "Doooomsday," indicating fans' excitement and speculation.
While the idea of Isaac joining Avengers: Doomsday is tantalizing, it's still just a theory. Marvel Studios is known for keeping surprises under wraps, and although Isaac wasn't listed in the initial cast reveal for the film, producer Kevin Feige hinted at more unannounced cast members during a CinemaCon video call, saying, "We revealed many, not all."
Isaac previously starred in the six-episode Moon Knight series released in 2022, but there has been no official word on a sequel. Avengers: Doomsday is slated to premiere on May 1, 2026, promising a lineup of returning heroes and new faces, as showcased in the epic livestream.
In other MCU news, fans are also buzzing about Robert Downey Jr., who recently sent out a Doctor Doom-themed invitation for his 60th birthday party, adding another layer of intrigue to the Marvel universe.
Meanwhile, the cast reveal for Avengers: Doomsday last month confirmed a significant presence of veteran X-Men actors, including Kelsey Grammer (Beast), Patrick Stewart (Professor X), Ian McKellen (Magneto), Alan Cumming (Nightcrawler), Rebecca Romijn (Mystique), and James Marsden (Cyclops). This lineup has led to speculation that Avengers: Doomsday might secretly be an Avengers vs. X-Men film.