It's not a sure thing, though. Remember The Dark Knight teaser? No scenes, just dialogue. We didn't even see the Joker until almost six months later. Teasers are usually short and show little of the actual movies. Plus, with TLA, I'm willing to bet almost none of the CGI for the bending is even remotely finished for any scene yet. I doubt we'll see much. However, there is going to be a press release around the same time where we'll see pictures of the cast in costume and what not, so that will count for something.