New Mutants, Vol. 1 #100 (1991)

The Beginning of the End
he New Mutants hear battle noises in the Danger Room. They check it out and find a mysterious warrior destroying their equipment. None of them know the brutal warrior, so they attack him. It’s a hard battle but Cable eventually manages to defeat the man. Later in the infirmary, the man introduces himself as Shatterstar, travelling back in time to enlist the X-Men's help in defeating Mojo and Spiral. The team is then attacked by Imperial Protectorates sent to kill Shatterstar however, they are all killed. Later, Boom-Boom goes for something to eat, she finds Feral in the kitchen! The two fight as the New Mutants arrive. Feral explains that she’s being hunted by Masque and his subterranean goons, looking to start a war with the surface world which she wants no part in. The New Mutants believe her as Cable kills Brute, Masque and Hump get the point and leave. After some rest and a shower, Cable gathers the team for a talk. Everyone agrees that they are no longer safe. Cable explains that Shatterstar, Warpath and Feral have all agreed to join the team in return for some help. He suggests they move away from the bunker, since they are no longer. After a discussion, everyone agrees and they depart. Elsewhere, Stryfe returns to his troops, the Mutant Liberation Front, dispatching a small task force to do some damage. After that, he thinks about the coming war, which is going slower than he would like. He takes off his helmet, and is revealed to be… Cable?!
Release Date: 1991