If there showed any interest there could be a nintendo vs capcom, though unlikely at this point. Nintendo vs DOA would be more likely if only by a hair's breadth. I say this cuz you never know what the future brings. Certainly never thought I'd see a sonic vs mario game. Crossovers are always good. MvC 2 has stayed strong all these years. Can't say the same of its successor, though.
Why you think would they not bother with M.E.?
We'll murder them all, amid laughter and merriment...except for the few we take home to experiment!
"I cant see S***! --YOU GO TO HELL!" --Tourettes guy