From what i heard, it's not 'may', it's 'will'. There will be a Smash Bros on it, but development has not started yet, or only started recently, something like that. 1 feature i read about on it was to be able to include your Mii characters in it. Whether you have a basic set of moves, or able to pick and mix from other characters, i don't know. I don't know if Final Smashes will return, i imagine they will. There's little info, so i also don't know about how many characters, who's returning from Brawl (i.e Wario, Lucario, Meta Knight, etc), or 3rd party characters (Snake & Sonic). I'd guess there will be more of everything. But as far as i know, there is a Smash Bros. 4 going to be on WiiU, but likely not for a while.

Its not "maybe" its "will come." This is stupid. People KNEW the game was coming over 5 months BEFORE the game was even being developed. Masahiro Sakurai just stated he started development right after Kid Icarus: Uprising. The game has been development for over 2 months now so its "will come."Get your stuff right!

Now I do :3