I think probably my favorite parts of that trailer included Tifa kicking the shit out of that guy, anything with those motorcycles, and when bahamut (?) was being fought by Vincent, Yuffie, Barret and Cid.
Also, I took a frame-by-frame look at the very end of the trailer, because I know I saw something, and yes, it was indeed Sephiroth, I can tell that armor anywhere.
<3