"Aftermath"
Special Agent Jack Kubrick has been assigned a difficult task: to find and arrest Machine Man. What he finds is a path of destruction. Sentinels have been on a rampage, and from the survivors Jack gathers that it somehow involves Machine Man and the X-Men.
When he finally finds Peter and Jill Spalding, two known acquaintances of Machine Man, he gets the whole story. It seems Machine Man was somehow infected by the Sentinels, and they had come to finish the job physically. The X-Men come to aid their old friend, but when Machine Man attempts to interface with a Sentinel something goes wrong.
Machine Man is corrupted further by the Sentinel, and turns on the X-Men with the intent to kill. After a short battle, he regains control enough to activate his self-destruct, seemingly destroying himself to save his friends.