It's been rumored that the new [Avatar 2](movie:38662) trailer could be revealed this year due to lack of anticipation. I believe that it could be shown with any number of fox films like:
1. Spy (June 5th)
2. Fantastic 4 (August 7th)
3. Hitman agent 47 (August 28th)
4. On December 10th
This was the release date for the first film so yeah it could be.