I know, right? There’s poor Sadie, with a major role in the summer’s hottest movie, going on talk shows but contractually obligated to keep her mouth shut. The gag order on Sink stems from Marvel Studios and its strict non-disclosure rules to protect the massive surprise introduction of her character, Jean Grey, into the Marvel Cinematic Universe. Her casting as Jean Grey marks the official integration of the X-Men mutant saga into the MCU, a huge milestone kept under wraps for two years. Her character functions as a central, conflicted antagonist driven by grief and hunted by the government, which directly impacts the core plot of the movie.