I have been watching Star Wars: The Force Awakens trailers pretty closely, and I think this new teaser — released on Star Wars Korea's YouTube page of all places — shows some new details.
Mainly, it shows The First Order in all it's glory. It looks amazing.
This post, on the official Star Wars Facebook page would seem to confirm this is a new shot.
The rest is a different edit of shots we've already seen. But still — that opening shot. I AM EXCITED.