I'm not sure if this has been brought up, but I'm hoping for some more Mother in Sm4sh. Since we got Lucas in Brawl, perhaps they'll give us another character from the series, seeing as the games themselves won't be coming to American any time soon. I'm hoping for Masked Man, even though I know the chance of him is like... zero. But, eh, I can hope.
My new character list:
Krystal (Star Fox)
Ridley (Metroid)
Megaman
Tetra/Zelda(with a transformation similar to Zelda/Sheik)
Masked Man (Mother 3)
K. Rool
Roy
I can hope. I hadn't even considered Roy coming back 'til I read a little of this thread, so now I'm kinda hoping, even if it isn't the most likely. Personally, I want them to keep every character without nerfing them to high hell. I'm not a competitive player, but I can still tell the difference.
I'm sure everything I've said has been mentioned five times over, but it would take forever plus five just to find it in this thread... and this is just my 5 cents.
And woohoo, first post.