A member of the N-Sider forums did something good (for once) by making a detailed analysis of Meta-Knight as seen in the trailers and including animated GIFs! This inspired me to try it on my own with the rest of the bunch. I'll add more as I finish the images.
Looks like a normal A attack.
Possibly an Forward tilt or smash attack.
Upward tilt or smash attack.
Possibly his A-Air attack.
Possibly his foward A-Air attack.
Possibly his back A-Air attack.
Down A-Air attack.
Gliding may be a recovery (Up+B) special or something else entirely.
Three-hit A attack.
I'm guessing it's his A-Air attack.
Zero Suit Samus
Crocuhing attack, a forward tilt, and an upward tilt most likely.
Wario's dance-like motions, probably his run animation.
Possibly a taunt, but could also be his upward tilt.
Little harder to tell. Could be a forward smash attack.
It's "the" combo. A attacks, almost definetly.
Possibly his Down-A Air, followed by a forward tilt, and a forward smash.
An upward tilt followed by either a downward smash (my money's on that one) or a special attack.