The music's beautiful.
Stage looks interesting and promising. I don't say it much, but I seem to prefer the battle stages that are huge or dynamically change. Must be why I enjoyed Melee's Big Blue stage, because I'm constantly having to hop onto different F-Zero cars along the way, all at different angles. Actually, Mushroomy Kingdom seems better on second glance since the blocks and combatants are in scale like the original Super Mario Bros. (i.e. you can't immediately jump to the top blocks from the bottom platform), so the blocks seem like genuine platforms instead of minor trip-over obstacles. Pipe looks blocked off, but it'd be neat if you could jump into the pipe and hide temporarily. Anyone else who jumps in can still attack you though.
That's it. Once I get a Wii, I'm getting Smash Bros. Brawl. I don't care if Falco doesn't appear, there's just way too much cool new stuff in this game to ignore. I'll just have to live with the possible overdose of franticness (way too much random stuff that can happen during a battle).
Who will I play as in Brawl? Whoever's the most nimble, as in previous games. So it'd probably be Sheik.