1. Sonic
Why? - It's just GOT to happen. The rivalry needs to be settled, forget polevaults, handbags at dawn is where it's at. I'm sure fans of both mascots are just dying for the announcement
2. Bomberman
Hudson has been faithful with lotsa titles on the Wii download service. And Bomberman himself has appeared on too many Nintendo consoles to date, make it happen, include him, he'd have a great moveset.
3. Waluigi
Well, we've seen Wario, but seeing as Waluigi is becoming a star in his own right, it's about time he got a chance to duke it out. He's my favourite Mario villain, I've just gotta see a CPU battle of Mario Bros. V Wario Bros.
4. Dedede
Come on, he's got to be in it, I'm betting he is. He could utilize his hammer/eating attacks and be a more complex Kirby.
We're getting MK, but Dedede was there first, he's the big one, No doubt he'll be unlockable
5. Stafy
Cute li'l Stafy. I've never played a Stafy game, and you'll know why. They're Japanese only games, but have got praise from Western fans too. Like they did with Marth and Roy, using Stafy to represent the series and get a cult could mean Legend of Stafy coming to here.
6. Ridley
It's also one i'm expecting, the rumours are already flying around, i'll be shocked if a main and recognisable Metroid villain doesn't appear. Ridley fits that space
7. Diddy
Donkey is known for his many Mario Kart/Sport/Party appearances, but he also appeared in his own games, Diddy needs to give him some assistance by joining the DK reps.
8. Bowser Jr.
First appearing in SMS on the Cube, he's got quite a fanbase as Bowser's mischevious son and Mario's doppelganger. Some sort of moveset using Gadd's paintbrush/Bowser-esque attacks could work well.
9. Megaman
Well, he's got a pretty good chance of appearing, i'd lke him to. Not too bothered if he doesn't
10. Midna
Oh c'mon, she's Twilight Princess' titular character, she's cool, classy, dark, mysterious. She's a favoured character, I think she's appearing.
& Sheik :3