Characters I want to see in it other than what has already been confirmed:
Krystal, Blaziken, Dark Samus, Bowser Jr., Wolf O'Donnell, Diddy Kong
Since I don't really care what other characters make it in, I'll post a list of what I expect to make it in:
Any Non-Nintendo only Franchises. Everything up to this point has been Nintendo only. Snake is a special exception. if you view the video, you'll notice he got "invited". He's like those system specific bonus characters you got in SC2. He's obscure enough where he can fit, but if you throw in anyone else whose is more easily recognizable as a character from another system, then you indeed ruin one of the greatest things that makes the game so much fun.
And just for the record, I resent the comment of no more Pokemon, and no more Star Fox other than Wolf. Pokemon are quite fun, I'll have you know, and Krystal is one cool chica. They could go for more female characters anyway, they had like, what, 4 out of 25 characters that were female in Melee, two of which were essentially the same character?
I also resent the above comment. DK was around before Mario even had his name, so he deserves his place, not to mention the Donkey Kong Country games were a large part of the SNES's success. Fire Emblem happens to be an awesome franchise, and although Roy and Marth have yet to make any Western appearances other than Melee, Fire Emblem needs it place. In fact, that just gave me an idea: how about some Advanced Wars characters?