Sadie Sink Speaks Out on Marvel Rumors: Spider-Man & Avengers Role Explained!

Sadie Sink finally addresses rumors about her mystery Marvel role in Spider-Man: Brand New Day and Avengers: Secret Wars. After wrapping Stranger Things, the actress joins the Marvel Cinematic Universe — but who is she playing? In this video, we break down everything Sadie Sink revealed in her new Entertainment Weekly interview, including fan theories linking her to Jean Grey from the X-Men, her thoughts on the viral hair color clues, and what this means for the future of the MCU. We’ll also look at what we know about Spider-Man: Brand New Day’s cast, the connection with Avengers: Secret Wars, and what her addition could mean for Marvel’s next big phase. Keywords: Sadie Sink Marvel, Spider-Man Brand New Day news, Avengers Secret Wars cast, Jean Grey theory, Marvel Cinematic Universe rumors, MCU updates, Sadie Sink interview, Stranger Things star joins Marvel, Marvel casting news.