Dunno, but it's gonna be him. Jigglypuff was unlocked on the live stream at 90%, and we're at 91% now and 34 characters unlocked. Just enough room for 36 on the SSE box, but if it's odd, it won't matter and will likely be a 35 character roster after the next 9%.
That 9% will probably be Wolf. They've been right about ABSO-FREAKIN-LUTELY everything else thus far...there'd be no reason for it not to be so.
Since Falco's a semi-clone of Fox, I'm really holding out for Wolf to be something special. We know his FS will be different, at least. Team Star Wolf doesn't have an answer to the Land Master that I'm aware of.
We do know. There's only room for 36 in SSE, and we know for a fact that if all these characters are SSE playable, even the ones that do not fit in whatsoever, can be played in SSE, that it can be concluded that SSE can be played with all characters on the roster. Therefore, we're maxing out at 36, but we can assume it's 35 because the leaks have been 110% right thus far. Right down to the position of the portraits on the character select screen.
A new bunch of magical characters aren't going to pop up that are inexplicably not able to be used in SSE. There's 35 characters in this game. No more, no less.