The mystery around Sadie Sink‘s character in Spider-Man: Brand New Day show Marvel still has a problem confusing secrets with hype. Since her casting, there have been rampant rumors about who Sink will play in Spider-Man: Brand New Day. There has been speculation that Sink would be playing Jean Grey for nearly a year. “Jean,” Lacy said. Marvel probably believes that Jean acting as a villain in Spider-Man: Brand New Day will shock audiences.