Multiple outlets report that Sadie Sink appears as Jean Grey in “Spider-Man: Brand New Day.” The casting is positioned as a significant MCU development because Jean Grey is a key character in the X-Men franchise. TIME says Sink’s debut as the telepath serves as a tease for future X-Men material within the MCU. Forbes similarly frames the film as confirming Sink’s role as Jean Grey and argues that this also clarifies direction for the MCU’s eventual X-Men storyline. Together, the coverage indicates that “Brand New Day” is not only part of Spider-Man’s continuity but also introduces or advances elements that point to broader plans involving the X-Men. Both sources treat the character appearance and casting confirmation as early signals about who will populate the MCU’s X-Men lineup and how the franchise may be brought into the shared universe. The reporting centers on what the film reveals so far rather than on additional plot specifics or release details for any X-Men projects.