Stranger Things breakout Sadie Sink has joined the Marvel Cinematic Universe as telepathic mutant Jean Grey in Spider-Man: Brand New Day, upending traditional comic lore with a controversial villainous debut.

Musician Steve Lacy appeared to leak Sadie Sink's secret X-Men role as Jean Grey during a red-carpet interview at the Spider-Man: Brand New Day premiere.

Marvel Studios has released the first trailer for Avengers: Doomsday, showcasing Robert Downey Jr.'s role as Doctor Doom and the return of Chris Evans as Steve Rogers.