Let's see.....
The world of Steamboat Willie
The world of Pirates of the Caribbean
The world of the Lion King
The world of Tron
Steamboat Willie was a surprise. I hadn't really expected that. The world of Tron either. The Pirates world looks pretty good, and oddly enough sora doesn't look too out of place. I kind of thought the Lion King Sora looked interesting...wonder how he's going to hold the keyblade. Anyway, now for the trailer.
Trailer
That's the trailer that shows off some of the new stuff.
Let's see (For those who won't or can't watch it) it shows:
Pirates of the Caribbean
Steamboat Willie
Nightmare Before Christmas, actually involving Christmas (Oogie's back...)
Agrabah
Beauty and the Beast
Mulan
Control of the new kid
New techniques
New summons
Interactions with certain things in the environment
Team techniques
Advent Children Cloud
New enemies
New guys in cloaks (a lot of cloak guys)
Riku in a cloak (he has Riku's sword at least)
Some weird Flying minigame (edit: turns out its the gummi ship...looked like Sora for a while)
that army we saw in one trailer...you actually fight it (or some of it at least)
So basically none of that (after having been revealed above) is that much of a surprise, and quite a bit was to be expected, but it's just really nice to see the stuff listed. It just looks really nice.
Oh, and a release date was shown:
2005.12.22
Too bad that's for the Japanese, though...