Sadie Sink, who gained widespread acclaim for her portrayal of Max Mayfield in Stranger Things, is joining the cast of Spider-Man 4! Yes, that’s right. While the news has stirred up excitement, one big question remains—who exactly will she play in the upcoming film?
While Marvel has kept her character under wraps, several fan theories have emerged, with the most popular being that she could portray a new character in the Spider-Man universe or an established one from the broader Marvel realm.
One of the most talked-about possibilities is that Sink could play Jean Grey—the telepathic and powerful X-Men character. This theory makes sense considering Marvel’s recent efforts to expand the X-Men universe, and Sink’s dramatic range could certainly suit the intensity of Jean’s character. However, this remains pure speculation as no official confirmation has been made.
The prevailing theory is that Sadie Sink will be introduced as Jean Grey in ‘SPIDER-MAN 4’
Another character suggested was her playing Mary Jane.
(Source: Deadline) pic.twitter.com/qw55OZSZF2
— DiscussingFilm (@DiscussingFilm) March 12, 2025
Another theory that has been swirling around involves Sink playing Mary Jane Watson. Zendaya has already made her mark as MJ in the MCU. However, some fans wonder if the introduction of a multiverse storyline could lead to Sink stepping into a version of Mary Jane. Possibly from an alternate universe. Again, this is all conjecture at this point, but it’s a fun idea for fans of the Spider-Man franchise.
The prevailing theory is that Sadie Sink will be introduced as Jean Grey in ‘SPIDER-MAN 4’
Another character suggested was her playing Mary Jane.
(via: @DEADLINE) pic.twitter.com/iNTrzgz5KR
— X-Men Updates (@XMenUpdate) March 12, 2025
While the exact details of Sink’s character are yet to be confirmed, we do know that Spider-Man 4 will bring back Tom Holland as Peter Parker/Spider-Man. The film is set to continue the story of the beloved character after the events of Spider-Man: No Way Home, where the multiverse played a major role in shaping Peter’s journey.
Directed by Destin Daniel Cretton, the film is expected to have a larger focus on the multiverse, and we could potentially see more characters from different universes making appearances, making Sink’s potential role even more exciting. Filming for Spider-Man 4 is slated to begin later this year, with the release date set for July 31, 2026.
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