I always play as Yoshi because he can jump high and I like Yoshi...
...when the new game comes out...I will also pay as Yoshi.
But seriously I think Megaman should be in this next one. OBVIOUSLY that opinion is not a unique one, but specifically I'd like to see him in this game since he wasn't in MvC3. Other then that I don't care WHO they put in it as long as it's interesting and not just another different version of a character. Like seriously, maybe Olimar was a dumb pick but they're clearly not afraid to try unorthodox character choices, which I love about the franchise. I mean, who even took Mr. Game & Watch seriously at first? All like "Pfft what's a Game-and-watch this is butts he's only 2-dimensional THAT'S LAME." BUT HE'S PRETTY AWESOME YOU GUYS!
Maybe this time they'll finally kick out Jigglypuff. I mean, I'm sure people into the meta-game can explain to me how it's totally NOT just a lamer Kirby...but it's just a lamer Kirby. Also, while we're on the subject of Pokemon, I hope they don't do the predictable thing and swap out Lucario with Zoroark. ALSO-also, I don't know how to feel about the Pokemon trainer. It suddenly dawns on me a good chunk of the roster has slowly become POKEMON, and while Pokemon are cool and everything, maybe dial them back a bit? Hey Nintendo, tell you what, if you want real-time fighting Pokemon so badly MAKE A POKEMON FIGHTING GAME ALREADY! JEEEEZ I WANT ONE SO BADLY!
And my only other specific desire for the new game is since they're making a new Luigi's Mansion I'd like to see Luigi with a Poltergust 3000 this time around.