Sadie Sink is officially leaving the mysteries of Hawkins behind for a huge step into the Marvel Cinematic Universe.
The Stranger Things fan-favourite will appear in Tom Holland’s upcoming film Spider-Man: Brand New Day, marking her superhero debut.
Now, new reports say her Marvel career will go much further than just one movie.
According to Deadline, Sink has also been cast in the massive crossover film Avengers: Secret Wars, arriving after Avengers: Doomsday.
This means she will join the biggest MCU storyline since Endgame changed everything forever.
Marvel fans are already hyped about what this means for the franchise moving forward.
Spider-Man: Brand New Day will hit cinemas on July 31, 2026, kicking off her arrival in spectacular fashion.
Filming for Secret Wars is expected to begin in London sometime in 2026, shortly after production finishes on Spider-Man.
The film will continue the multiverse saga while bringing multiple legendary characters together again.
Reports say heroes from past eras of Marvel could make dramatic returns for an epic finale.
That could make Secret Wars an even bigger crossover event than Infinity War or Endgame itself.
Sadie Sink’s mystery role remains unconfirmed
Marvel loves secrecy and this is no different.
Fans online are debating who she could play in the expanding universe next.
Some believe she might be a brand-new version of Gwen Stacy or Mary Jane Watson for Holland’s Spider-Man.
Others suggest she may bring X-Men icon Jean Grey into the MCU for the first time.
Either reveal could lock her in as a major superhero for many future Marvel stories.
Her role in Secret Wars might even set up the franchise after the multiverse saga ends.
What we know about Avengers: Secret Wars so far
Story details remain tightly hidden behind Marvel’s usual security walls.
It will directly follow Avengers: Doomsday and push the multiverse to its final breaking point.
Robert Downey Jr. is confirmed to return but this time playing Doctor Doom instead of Tony Stark.
Yes, that twist shocked fans everywhere and sparked huge excitement online.
Marvel will release the Doomsday trailer in December, teasing the true shape of the endgame.
After that reveal, major Spider-Man announcements will reportedly follow very quickly for fans.
Sadie Sink has already earned worldwide love through her fearless performance as Max Mayfield in Stranger Things.
Now she is preparing to join Earth’s Mightiest Heroes in the biggest cinematic battles yet.
Fans may soon say goodbye to Max in Season 5, but they are definitely not saying goodbye to Sadie.
Her next adventure looks larger, louder, and just getting started.
Featured image credit: Marvel
