I really hope for a few things in particular
- All clones removed or completely revamped. I don't care if you use them differently having similar looking and functioning moves is really silly in a game with movesets as small as Smash. Lucas, Falco, Wolf, Toon Link, etc... need to go. They are wastes of slots
- Ganondorf needs his own moveset. He even pulled his sword out as a taunt in Brawl, which was such a slap in the face. I think they should convert him to his Wind Waker self as celebration for the HD Remastering of that game. This way, he has two giant swords with potential for a new moveset.
- Get rid of the clone moves the old Ganondorf had and give that moveset, because quite a few of his unique abilities in Brawl were awesome, to Black Bull from F-Zero. F-Zero needs another rep and this way we have another villain and one of the only other iconic F-Zero characters.
- Make Midna riding Wolf Link a playable character. I'm a huge Midna fanboy she MUST be playable or I will burn down Nintendo of America headquarters (benefits of living 15 minutes away from Redmond).
- Don't put tripping in the game again...
- Ridley should be playable. I don't care if he's "too big," scale him down a bit to Bowser size if need be. Metroid needs more characters and Smash needs more villains.