Marvel's Spider-Man 4 Rumors Link Sadie Sink to Potential X‑Men Crossover

Fans are speculating that Sadie Sink’s undisclosed role in the upcoming Spider‑Man 4 may be the mutant Jean Grey, which could signal an early tie‑in to Marvel’s X‑Men saga. Neither Marvel Studios nor Sony Pictures have confirmed the rumor, and the film is set for release on July 31, 2026 as part of the Spider‑Man: Brand New Day slate.

Social‑media users have compared Marvel’s secrecy to previous marketing moves, such as Benedict Cumberbatch’s hidden role in *Star Trekk: Into Darkness* and Christoph Waltz’s reveal as Blofeld in the James Bond film *Spectre*. One tweet noted, “Audiences love when you cast a famous person in a mystery role and then reveal who they’re really playing halfway through the movie,” while another commented, “It either has a negative reaction or no reaction because everyone already knew.”

If the speculation proves correct, the X‑Men actors are expected to return in the forthcoming Avengers: Doomsday, tying the franchises together ahead of the 2026 releases.