OK, why do you people think certain characters will end up broken after watching such a cinematic trailer? for one thing, I don't think the moves have been finalised (except for returning characters which will probably remain the same in most ways) and none of the characters in ssbm ended up broken to any great degree, so why assume hal will mess things up for the sequel? They obviously know how to balance the characters already. Somebody said sheik is broken, but really, she can still be countered by some characters, it's not as if she's unbeatable or anything. ssbm had possibly the most balanced characters imaginable, if anything, they can only become more balanced, since hal can apply everything they learned from ssbm.
I also can't see many more 3rd party characters being added to the list, despite kojima proving how great an idea it is. Also, I know nintendo often aims their games at a younger audience, but come on, fart abilities? that is so very lame. I would like the ability to vote wario out of the game, big brother style.