Well, they announced Rosalina which I don't think anyone was expecting, so really it's anyone's guess.

i predicted Rosalina! (not with Luma though lol). Anyway its logical choices. All new characters aside from Rosalina represent a franchise. Nintendo has two other franchises that need representation. Isaac+Saki from Golden Sun+Sin and Punishment!

any other predictions?

I'm predicting Shulk as a newcomer!

-Yoshi, Ness, Cpt.Falcon, Jigglipuff confirmed to be in the game, + a new comer.
-A few stages (maybe a MK stage since the MK hype train is currently in full force), finale smashs and items.
-I predict a new game mode.
-A system similar to MK.TV where you can record fights or highlights and post them on Miiverse (and hopefully other social networks)
-Hopefully some details about the online (ranking, tournaments, communities etc...)
-Info on the 3DS/WiiU connectivity.
-Remember when Sakurai talked about more character customisation a while back? I think it's about time we start hearing about it (assuming that idea has'nt been canned)

And finaly, no launch date but a launch window (fall/holyday 2014).

Shulk is amoung top characters to be announced, but im going with my goddess! "Palutena"

My top 4 predicted newcomers:
Wonder Red (TW101)
Bayonetta
Shulk
Rayman

Reggie as a playable character dammit!  I think one of the three four remaining Smash Bros 64 veterans ( Yoshi, Captain Falcon, Ness and Jigglypuff) will get revealed along with  another newcomer! We will also get more information about the online aspect and *hopefully*  about gameplay mechanics!

Rayman..... Would be cool but no way. I have a character that has no chance too. Name is Bomberman!

Soooo You dont like jigglypuff or something?