I stayed up for a couple of hours after the reveal last night, pouring through the video and the screenshots and working out what stages were in, the changes to the characters, whatever. I couldn't get the post up on GAF, so I went to bed, and wake up to not only all those things confirmed, but fucking Wii Fit Girl? This is amazing. Like Sakurai mentions, nobody saw it coming. Its so out there.
I'm taking the rumours with a grain of salt - Writing 'oh, see, we already knew about this' is the easiest thing to do, but Little Mac, Pacman and Mii would all be good additions. And more than that, if they're getting revealed soon, then I feel pretty confident there's a pretty damn large stable of newcomers in this game, because they haven't even touched upon the more 'obvious' choices, and you'd think they'd want to keep some surprise characters for later.
Pumped, pumped, pumped.