eh? what the what? gee.... i guess it seems slower because:
1. its just a trailer, more or less captured straight from the computer they developed it on, and since it mus thave been straight capture from said computer, it should be slow, considering that computers arent that fast compared to platforms.
2. still just a trailer, since it is still just a trailer, that means that this is most likely the beta version of the game, as in, not the final. and since its still not the final, it must have been slowed down to see things, such as graphical problems or whatever. sorta like how they made the beta versions and trailers for sonic the hedgehog 2006 slow. get what i'm saying?
3.also, it seems slow cause that's how they made the gameplay for the trailer, so that they can show it off in finer detail. gets?
also, last time i watched it, it didn't seem any slower than the current ssbm, your probably just seeing/thinking things.