X-Men: Dark Phoenix writer/director Simon Kinberg has revealed new details about the plot of the film to Entertainment Weekly. In Dark Phoenix, set roughly 10 years after X-Men: Apocalypse, the X-Men are nationally celebrated heroes - but the fame gets to Professor X's head, leading to a cosmic adventure.
“Pride is starting to get the better of him, and he is pushing the X-Men to more extreme missions,” Kinberg explained, elaborating that the film will be one of the most emotionally driven of the entire franchise, and will include a twist that will completely change the X-Men film universe.
It's also confirmed that Jean Grey will become the Phoenix (naturally), and the movie will be a "fight for her soul" that "splits the X-Men."
“It’s about the butterfly effect of this thing happening,” says Jean Grey actress Sophie Turner. “What happens when the person you love the most falls into darkness?”
Additionally, Jessica Chastain's mystery character was identified as an otherworldly shapeshifter who comes into contact with the Phoenix. It was previously reported that her character was Lilandra of the Shi'ar, but that has been called into question.
Regarding the "otherworldly shapeshifter" bit, keep in mind that it has been established that both Fox and Marvel Studios have rights to use the Skrulls, individually.
The Entertainment Weekly issue with the X-Men: Dark Phoenix cover seen here is out on shelves December 8.
X-Men: Dark Phoenix is due out in theaters November 2, 2018.