The trailer for Marvel's upcoming crossover film Avengers: Doomsday has reignited fan frustration that a standalone X-Men film still has not materialised in the Marvel Cinematic Universe, despite the mutant team's growing presence in ensemble projects. Writing for Collider, Carolyn Jenkins argues that while the film brings together an impressive array of characters, the returning X-Men actors merely underscore what audiences are still being denied: a proper feature dedicated to the team.

The Avengers: Doomsday trailer features Robert Downey Jr. as Doctor Doom, alongside the Black Panther team, Fantastic Four, New Avengers and Shang-Chi, with Patrick Stewart and Ian McKellen reprising Professor X and Magneto, and Rebecca Romijn, James Marsden and Channing Tatum returning as Mystique, Cyclops and Gambit respectively. The article notes that these are the same actors and storylines fans have already seen during the Fox era, with recent projects such as Deadpool & Wolverine and The Marvels similarly teasing the X-Men without delivering the full ensemble film that has been promised for years.