The Economic Times

Sadie Sink's mystery role in 'Spider-Man: Brand New Day' revealed: Who is she playing? The surprise changes MCU forever

After months of speculation, Spider-Man: Brand New Day has finally revealed Sadie Sink's mystery Marvel role. The Stranger Things star plays Jean Grey, marking the first major X-Men character to officially join the MCU's main Earth-616 timeline. Here's how the film introduces her, what powers she has, and why her debut could reshape the future of the Marvel Cinematic Universe.