I expect basically none of these, but I'm hoping for them all:
(Mother 1 soundtrack) Pollyanna - I Believe In You
Disclaimer for this link: If you listen to this, you may never be able to
not remember the lyrics when playing Onett in SSBM. >_>
Yes, I want the full voiced song. Preferably with a higher-pitched voice than Catherine Warwick's (it makes no sense to me to be that low for a Mother game), but mostly I just want it in. If the awful DK Rap gets in yet again, this should be a given.
(F-Zero GX) Captain Falcon's theme
Disclaimer for this link: Ignore the One Piece video. I'm too lazy to find something more appropriate that just has the music, or some such.
The drawn-out repetition for the last minute needs to be killed, but other than that I'd like to have this in, as an alternate for whatever Mute City level is in this time. I think it works for a fighting game, and it would give homage to the truly awesome racer that was FZGX. Besides, F-Zero GX came after SSBM and Sakurai and team seem to be on a kick of updating to the most recent renditions of characters, so I could see this theme being somewhat likely. At least moreso than Pollyanna, though I'd rather have Pollyanna.
(Kirby's Dreamland 3) First level theme
Disclaimer for this link: It's Kirby's Dreamland 3. If you've never played the Kirby series, don't decide that it's worthless because of this video. KD3 is pretty average, and it took at least thirty steps backward from Kirby Super Star. KSS was generally spectacular, is to me as Super Metroid is to Sharp, and when it comes out on VC it should be bought by every Smash Bros. fan because the control scheme probably gave rise to the Smash Bros. we know today. KD3? Just... eh.
Still, a few good things came out of that game, and this piece of music is the main one--it's probably my favorite for the whole Kirby series. Definitely preferred over Green Greens, which isn't easy since I do like Green Greens.
(Kirby Super Star) Float Islands, Revenge of Metaknight version
Disclaimer for this link: The guy's really not that good. And his sound gets desynced somewhere around the 4:55 mark, making the game seem laggy.
Music starts at 1:28 and goes on for about three minutes almost uninterrupted. This is another theme I like more than Green Greens (but not as much as the KD3 theme, or the Gourmet Race theme that everyone knows from SSB and SSBM)--it's one of the more reserved Kirby tunes, with none of that super speed candy pop sort of quality, while still retaining its upbeat nature. Very cool.
(Kirby series) King Dedede theme, KSS or Dreamland 3 versions
Disclaimer for this link: This guy gets his sound desynced and has some video issues with KSS. Anyway, skip ahead to about 4:50 to hear the two versions I'm talking about. In reverse order, for some reason: Dreamland 3, then KSS. Alternatively, skip to 8:10 if you don't want Dreamland 3 spoilers.
King Dedede probably won't be in SSBB even though he should be, but at least his awesome theme could be in. I like the above two pieces of music more, but this is definitely more for a fighting game.
I'd probably be naming Kirby themes all day long if I kept going. I'll just stop here.