Well, they never reveal ALL of the characters. Considering that Marth, Roy, Ganondorf, Falco, and Mewtwo were ALL secret caracters in Melee (and Ness was in the original), I wouldn't say that they have yet to be revealed is evidence they've been cut. I hope not at least. Marth was my go-to character in Melee, and I actually liked Ganondorf quite a bit too.