Spoilers ahead for Spider-Man: Brand New Day.
The Marvel Cinematic Universe is known for its tight security, with the cast and crew tasked with guarding the secrets of upcoming Marvel movies. Case in point: Sadie Sink's mysterious Spider-Man role, which turned out to be exactly who fans thought it was... Jean Grey. Rumors swirled about her playing the beloved mutant for months ahead of its release, and Kevin Feige explained why they still kept it under wraps.