Come on Slippy... Make Slippy playable
Anyways the way the character structure on the first page is, i reckon they've got at least 1 new character to unveil as 3 originals,
By from what we tech. know (If we consider that Jigglypuff is in it)
We've got Liuigi, Jigglypuff coming back and so we're missing one original and one new
Dr. Mario, Capt. Falcon, Ganon, Falco, Young Link, G&W, Mewtwo, Marth, Roy
So, By using the N64, I reckon we'll be getting Capt. Falcon and thus if they only unveil 12 a piece, that gives us our character roster (Unless they go for 16 apiece *prays*)