I think they should have a live action version of the first opening for avatar (the boy in the ice berg)...put that as te long trailer...and then do the regular theme opening to avatar but do a live action still.....

http://www.tv.com/avatar-the-last-airbender/show/28841/the-last-airbender-movie-official--discussionupdated-07-20---new-crew-info!/topic/13281-965058/msgs.html?tag=board_topics;title;5