Do you want to see more third party character? How about Tales or Tekken characters? or someone else from Namco. Or what other Nintendo Characters would you like to see?

Pauline from Donkey Kong

Give me Cloud or give me death.

I'd like everyone from Melee and Brawl to return (No replacing characters). I can't think of any 1st party, but I would like to see Megaman and Zero.

Just keep it Nintendo, bar maybe 3-4 3rd party characters (Sonic, Snake & Pac-man)

This isn't Sony, Nintendo have plenty of great 1st party characters.

Professor Layton

No Tekken characters. The only namco character that would fit is Pacman. Personally I would like classic megaman to be in the game.

Simon Belmont for 3rd party, and Shulk(Xenoblade), or Elza(Zael from LS) as 1st party characters. Skull Kid, Midna, or Oni-link would be great as well.

Mega Man. I'd be happy with just Mega Man.

Having Tails, Knuckles, and other Sonic characters as alt-skins for Sonic would be a nice touch, but they don't have to be entirely new characters.

I'd love to see both Mega Man and Sora from Kingdom Hearts. You don't really even need to think about how they'd fit in--they're the kind of characters that would just work with Smash Bros.