THE CATACLYSM THAT LEADS TO THE X-MEN'S DYSTOPIC FUTURE! Return to the future in a tale that reveals the events leading up to the timeless original DAYS OF FUTURE PAST story that's inspired spin-offs, films and more! In a world where mutants are more than simply hated and feared, but not yet SLAIN and APPREHENDED, the assassination of Senator Kelly comes to pass, bringing with it the Mutant Control Act and SENTINELS on every corner. But with mutantkind on the back foot, what lengths will KATE PRYDE, WOLVERINE, COLOSSUS, STORM, BANSHEE, ANGEL, CYCLOPS, PROFESSOR X and the rest of the X-MEN go to in order to find some way to survive? And what scheme of MAGNETO will bring about their ultimate DOOMSDAY? Witness the thirty-year descent into the dystopic future, replete with the previously untold deaths of key mutant characters, as we flesh out one of the most celebrated X-MEN timelines in its own series for the first time!