TMDb/Avengers: Doomsday Movie Cyclops returns! James Marsden reveals his new comic-accurate costume in Avengers: Doomsday, ditching the restrictive leather for classic X-Men style. March 25, 2026 AceShowbiz - Avengers: Doomsday will see the return of James Marsden reprising his role as Cyclops, and the actor recently shared insights about his character's updated look in the film. Appearing on Jimmy Kimmel Live!, James Marsden discussed suiting up once again as a member of the X-Men, highlighting the key difference in his costume this time around.