I'm curious as to whether they're actually going to reveal any secret characters. I assume Snake and Sonic will need to be unlocked (albeit easily, like through SSE) but Snake was revealed because it was the huge twist of Brawl, and Sonic was revealed to soften the blow of the pushback.
So, assuming that every character other than those two are starters, that leaves us with 20 starting characters (not a shabby number considering Smash64's eight and Melee's...what was it, fourteen?) Considering the profile pictures it had to choose from on the wifi update, though, I don't think Lucas will make the cut as a starter, but maybe they just did some creative editing with that picture; if he turns out to be secret, then the rest of what I have to say is pretty much null and void.
Should Lucas turn out to be a starter, though would Sakurai start releasing characters that are "secret"? After all, they're not exactly secret if you know they're there. On a sidenote, should he bother revealing Luigi or Jigglypuff, characters that most players take as a given for being there considering the history Smash has sort of established for itself?
I'd LIKE to see a new character revealed or a vet confirmed, but if Sakurai is trying to avoid spoiling what secrets Brawl will have to unlock there's always the chance that he just keeps the rest of the cast to himself and uses the time to flesh out on the Dojo everything else that will be available from the get-go, other than things related to Sonic and Snake.