Aye, didn't realize you were speaking about movesets. In that case, I want to see every character changed. I mean, that's a given—no character will play identically to their Brawl incarnation. Easily-observable changes are in the actual moves, like if they replaced Link's boomerang with a hammer, or the beetle. Speaking of, we haven't seen any boomerang action yet, have we? I wonder if they've got a new side special to unveil at a later point in time.
Sakurai deliberately avoided showcasing Link in that 8 minute video, while he elaborated on Samus' and Pit's appearances and capabilities. I bet they've got something special in store for him. The beetle? The hammer? The whip? Wuddit be Sakuraaaaaai!
Maybe Link'll finally get some sort of transformation?
Or maybe they're just hiding him away so that they can introduce a different Link alongside?