Sadie Sink’s Next Marvel Movie After Spider-Man 4 Is the One You Didn’t See Coming
Stranger Things standout Sadie Sink is reportedly leaping from Spider-Man 4 to Avengers: Secret Wars — a shocker still unconfirmed by Marvel — after being announced in March 2025 alongside Tom Holland, Zendaya, and Jacob Batalon.
Sadie Sink might be hopping from Spider-Man straight into an Avengers movie. That is the latest chatter, and while it sounds legit, nobody at Marvel (or Sink herself) has put their name on it yet.
The report
Deadline reporter Baz Bamigboye says Sink will slide into the next Avengers film after she wraps Spider-Man: Brand New Day.
"Spider-Man: Brand New Day is scheduled to open on July 31. There has been much speculation about the role Sink has in the Spidey film, and frankly, I do not know the answer, but I do know that she'll join the cast of the next Avengers picture that shoots here in London later in 2026."
Again: Marvel Studios has not confirmed this, and neither has the Stranger Things star. So for now, treat it as a well-sourced maybe.
Why everyone thinks that Avengers movie is Secret Wars
The Hollywood Reporter has Secret Wars gearing up to film in summer 2026. Bamigboye says the next Avengers film shoots in London later in 2026. Those puzzle pieces fit, which is why fans are connecting the dots and assuming he means Avengers: Secret Wars.
Where Spider-Man 4 stands
Sony and Marvel set Sadie Sink for Spider-Man: Brand New Day (aka Spider-Man 4) back in March 2025, alongside returning stars Tom Holland, Zendaya, and Jacob Batalon. The movie is dated for July 31, 2026. Sink is currently on that shoot and, per the report, will be filming until the middle of December. What she is playing is locked down tight.
So who is Sink playing?
This is where things get messy. Internet sleuths have tossed out a bunch of names based on the usual set-photo whisper network: Jean Grey, Mayday Parker, Gwen Stacy, even Rachel Cole (the female partner of Jon Bernthal's Punisher). That is a pretty wild spread, from mutant royalty to Peter Parker's kid to a Punisher ally. None of it is confirmed, and the people who would confirm it are not talking.
The quick version
- Deadline's Baz Bamigboye says Sadie Sink will join the next Avengers film after finishing Spider-Man: Brand New Day.
- He adds that Avengers movie shoots in London later in 2026; THR says Secret Wars starts filming summer 2026, so the timelines line up.
- Marvel Studios and Sink have not commented.
- Spider-Man: Brand New Day (with Tom Holland, Zendaya, Jacob Batalon, and Sink) is set for July 31, 2026.
- Sink is reportedly on Spider-Man until mid-December; her role remains under wraps.
- Rumors flying: Jean Grey, Mayday Parker, Gwen Stacy, or Rachel Cole. Believe none of it until someone official says so.