This is not a complete surprise either, seeing the third act of Apocalypse shows Turner’s Jean Grey tapping into her Phoenix powers.
If that happens and Supernova does explore the Dark Phoenix storyline, then hopefully things will work out better for McAvoy’s Xavier than they did Patrick Stewart’s Professor X in The Last Stand.
X-Men: Supernova is reportedly in development, but has no official release date.
Not only would this give Fox a chance to do a proper live-action adaptation of the comic book story after X-Men: The Last Stand‘s poorly-received attempt, it would also give Sophie Turner’s Jean Grey a prominent role in Supernova.