Picking up nearly a decade after the events of Apocalypse and a baffling 30 years after First Class, Dark Phoenix takes place in 1992. Although Charles Xavier and Erik Lehnsherr have apparently not aged in three decades, somehow, over the next eight years, James McAvoy and Michael Fassbender are going to transform into Patrick Stewart and Ian McKellen. By this point in the films, Charles is supposedly 60 years old and Erik is 62, begging the question of whether they've been secretly harboring some antiageing mutant powers all along (and if so, what happens to them between 1992 and 2000 to take away those powers?).