Board Thread:Questions and Answers/@comment-2177268-20150126005003/@comment-2177268-20150206215947

ADour wrote: The Capcom and the Marvel characters of this franchise live in different universes.

Also, even if he could come back, even if he could be resurrected, he hasn't. He still hasn't been shown alive again. So as far as we know, he's dead. Dead-dead.

No one might stay dead, but as long as they're dead, they're dead.

The MVC is it's own universe. It also has it's own Days of Future's Past. It even has original characters (Even if that's just a cactus-man and a weirdo.)