Spider-Man: Brand New Day is currently the biggest movie in the world alongside Christopher Nolan’s The Odyssey, and doesn’t seem like it’ll be tanking at the box office anytime soon. So from at least one perspective, co-star Sadie Sink was responsible for keeping a lid on one of the most lucrative secrets in cinema history. And to her credit, she made it to release without letting it slip (to the public, anyway), but at what point will she have to start zipping her lips again as the MCU’s X-Men feature comes together?For instance, is it possible Sink is already playing dumb about the current progress of the next project where she’ll be portraying Jean Grey? It’s hard to automatically know one way or the other without Tom Holland around to provide tells. For instance, when asked by Vanity Fair about the latest casting rumors for Scott “Cyclops” Summers, the character Jean is often closest to in the comics, Sink claimed to have no direct insights, saying:Did he? There’s always the rumors, and I just never know what’s official.If we take her words to heart, then it indicates the upcoming Marvel movie being directed by Jake Schreier could potentially be casting for its biggest roles without chemistry sessions between stars. Hardly the biggest Hollywood sin at this point in the game, but still an interesting situation if that is indeed the case. Sink elaborated a bit after being asked if the set-up for the X-Men feature has been a separate process from everything she dealt with regarding her Spider-Man involvement. To which she answered:It’s a little bit separate. So I’m finding out through [director] Jake [Schreier]. There’s also so many online rumors, but it’s coming together. I think the timing of it is so exciting, and the way they planned it out is really clever just with introducing one of the mutants, a very important mutant through Spider-Man. I think a great cast is coming together, and I think people are going to be really excited about it when it’s all announced.Sounds like a normal enough answer, except she almost too-quickly veers away from speaking about herself and where she fits into it all. She points out that she's getting insights from the director himself, and then pivots to pre-planned quotes and talking points about the "timing of it" and having Jean be introduced through Brand New Day. Sounds like somebody needed to fill some space. Of course, it may just be that she didn't know, and wanted to have some kind of an answer so that she wasn't just sitting there quietly. But I'm still a little bit suspicious. It's too bad I don;t have any telepathic powers myself, although I dare say I'd be using them for things other than figuring out whether Sadie Sink is fibbing about X-Men stuff. Spider-Man: Brand New Day is currently in theaters, where Jean Grey's reveal has been a legitimate surprise for some crowds.