I look forward to the F-Zero X demo. (even though I already have the game)
Since that's where most of the F-Zero characters showed up, and were best represented. (Given I'm expecting Black Shadow to show up, but that's just me)
Anyhow,
I happened to come across these demo match videos on shoryuken forums (I snoop around there often heh)
Apparently stores in Japan have a demo, perhaps we might get one sometime?
http://jp.youtube.com/watch?v=CYmNmm-bNns - Ikki(DDD) vs Masashi(Ike)
http://jp.youtube.com/watch?v=GsauAh98gS4 - Ikki(DDD) vs Masashi(Ike) 2
http://jp.youtube.com/watch?v=BgQgkiTWSv8 - Ikki(DDD) vs Masashi(Ike) 3
http://jp.youtube.com/watch?v=4eWl-DCrjwU - Ikki(DDD) vs Masashi(Ike) 4
http://jp.youtube.com/watch?v=DeBHzWM3Erg - Ikki(DDD) vs Masashi(Ike) 5
http://jp.youtube.com/watch?v=KzQfkwdnXDo - Masashi(Ike) vs T2 (Kirby)
http://jp.youtube.com/watch?v=BIYQTuHCKQs - Ikki(Kirby) vs T2(Kirby)
http://jp.youtube.com/watch?v=eWWQ3CAYRr4 - Kein(Koopa) vs Ikki(DeDeDe)
http://www.youtube.com/watch?v=PCnbQFG0PHc - PT vs Link.
Damn DeDeDe's chain grab is crazy. He looks much better than what I expected. (Plus at first I didn't knew really how his Final Smash would work, but now I do, and its pretty neat!)