If capcom wanted another beat em up they would make another Final Fight in 2d. Though doubtful considering they tried bringing back Final Fight and it bombed hard.
they can continue the series on xbl and psn or remake the old games in hd
The idea sucks, and would get boring quickly. The AI wouldn't be enough to keep things interesting, and you'd be able to do the same combos over and over, and how would air combos work? You can't do them without causing problems for everyone that's on the ground, no one wants the camera taken off the screen because somone accidentally launched. And, who would the bosses be?
We don't need a new game using 15 year old sprites. A game like Tekken can get away with a beat-em-up because it's 3D, and you aren't fighting all over the screen, and you can lock onto characters. You can't lock onto a character in a 2D fighter, it would make it frusterating. Marvel Vs. Capcom isn't meant to be a beat-em-up. The massive amount of moves each character has Vs. the low amount of life the basic enemies would have would make things boring.
The only way a beat em up will work is if the super jump is removed, characters are limited to 1 reasonable hyper (Jin's Blodia vulcan would never work correctly in a game like this). And the cast of playable character is limited to 10. And, the combos for each character are re-worked, because everyone has the same universal zig-zag combo.
AI's don't play like humans.
kid so far all of your idea's sucked, like that mvc 2 far psp idea you was riding