Sadie Sink is moving from her starring role as Max in Stranger Things to the Marvel Cinematic Universe, joining the upcoming Spider-Man film titled Brand New Day. Industry observers have suggested she will play a character tied to the X-Men franchise, with Jean Grey and Rachel Summers cited as leading possibilities for her mysterious role.

An attentive fan noticed a striking resemblance between the red track jacket worn by Sink's Stranger Things character during season two and the outfit associated with Jean Grey's comic book origin depicted in 2008's X-Men Origins: Jean Grey. Whilst almost certainly coincidental, this visual parallel has intensified fan speculation about her actual character assignment. Her precise role remains officially secret, although reports indicate a spoiler emerged during the film's world premiere.