If there’s one person you could trust with your deepest, darkest secrets it would be Sadie Sink. And she’s become a real expert after keeping her lips sealed about her role in Spider-Man: Brand New Day for two entire years. She’s an adversary to Spider-Man (Tom Holland)—but as anyone familiar with the character knows, she’ll be a leader of the X-Men in future films. Sink and the other X-Men will likely appear in other Avengers movies as well, though the details (you guessed it) remain secret. I was unfamiliar with X-Men and Jean Grey at that point, but they kind of broke it down for me.