Oh crap... They better bring something big!... Something like Leon S Kennedy from RE4... Or Cloud from FFVII... Or eehrm... That guy from Tales of Symphonia... ...

Speak for yourself, they put Cloud or anyone from FFVII in the game and I am not buying it. Now Megaman would be nice though, although according to Megaman's creator he hasn't heard from Sakurai about using him.

playable Mii character

All of them.

I'd say the most likely would be plain olf Mega Man or X--those are the two everyone is most familiar with.  I'd prefer X because he could be the most interesting fighter--dash attack, climbing the sides of walls, etc.  Although regular MM could call Rush...

That would be SO awesome--you have NO idea!

 Down+B=slam hands on ground and cause a small earthquake XD

Sorry for the triple post, but I just have to say that, as awesome as it would be, there is no way they'd put Cloud in. He's going to be in Final Fantasy Dissidia for PSP, which is basically an FF Smash. I wouldn't totally rule out Sora, though, especially if it turns out that KH is coming to Wii.

In fact, maybe they just signed an agreement for KH3 and delayed the game to toss him in? (*holds out the tiniest smidgen of hope)

thank god you ppl arent in control of SSBB or it would be ruined by now.

What Sakurai is going to announce is that if Zero Suit Samus gets the Smash Ball, her Final Smash will make her lose the zero suit too. :P