M. Night. Shyamalan has produced some quirky movies in the past, and I have enjoyed them all. Plus I've watched the Nickolodean Avatar series, so hopefully this is a cracker.
The Fire Nation begins landing its troops. Given that, in the series, the Fire Nation attack didn't come until after Aang was frozen, this would appear to be a continuity change.
The Fire Nation navy is revealed. Note that their navy now has two classes of ships... the smaller landing craft, and the larger battleships. In the series, only the battleships were present.
Movie title, revealing the insignia of (from left to right) the Air Nomads, the Water Tribe, the Earth Kingdom and the Fire Nation. Each logo has been slightly redesigned.
M. Night has been trying to expand his horizons for a while now, but the studios have always demanded he keep making the same kind of films: horror and suspense. I think he deserves a chance to make an epic fantasy film, and judging from the trailer's cinematography, he has a solid grasp on how to film large-scale fantasy scenes.
When Avatar was first advertised I thought it was this. I couldn't see why it would cost that much to make a film like the cartoon... later found out it was different and no longer cared. It looks terrible from them trailers though.