The past several years have seen the Marvel Universe's mutant population rise to unprecedented heights of power and prosperity, but what goes up must eventually come down, and in the aftermath of this year's Hellfire Gala, the status of mutants and their nation, Krakoa, crashes back to Earth. This time period, known as the Fall of X, will be a dark one for mutants. So it only makes sense that a new darker incarnation of the X-Men forms to protect a world that fears and hates them.
Source：https://www.cbr.com/dark-x-men-steve-foxe-interview/
