Dark Phoenix is due to be released in February 2019.
We also get a look at Jessica Chastain's character, a shapeshifter now known only as "Smith", who seems to be taking a role in guiding Jean towards her darker impulses, perhaps (roughly) inspired by Mastermind's similar role in the comics story.
The first trailer for Dark Phoenix raises numerous questions, about frayed friendships, newfound partnerships, and the future - and past - of Jean Grey, but of course provides few answers more than four months away from the film's premiere. During a rescue mission in space, Jean is almost killed when she is hit by a mysterious cosmic force.
It means that the X-Men are forced to go up against not only one of the most powerful villains they have ever faced, but they will also have to go up against their best friend Jean, as she battles to stop Phoenix from hurting her loved ones. Now Jean is free to help rebuild the X-Men school, while honing her powers under the tutelage of Xavier, Beast, and Mystique.
James McAvoy reprises his role as Professor X, while Evan Peters is Quicksilver and Tye Sheridan is Cyclops. However, according to director Simon Kinberg, that theory isn't remotely true. The trailer of Dark Phoenix is out and we find out what the film is all about.
Sure enough the film has been trending on Twitter since the trailer dropped - and the response is generally mixed.
Things then took a turn for the worse for the Fox Studios movie when one Marvel fan took to Reddit to set the record straight after various conflicting reports. "But I need to see more", wrote one viewer. "They never seem to age?" Chastain added she "always" wanted to do a big comic book film, "but I had some issues with the female characters in the films I was being offered". Jean's Phoenix powers were last seen in the final fight scene of X-Men: Apocalypse.