The pics above are so beautiful! Anyway, I did some googling and the theater may look something like this. OMG! This is so exciting.
Also, don't expect an Avatar sequel anytime soon. James Cameron recently said that he will continue to push back the dates as necessary -- which means he's willing to ride out the Star Wars and Super Hero storm until it's totally dead. He has already stated that he does not want to face off with these hot franchises.
Anyway, Avatar 2 is going to be centered around the Na'vi family. "Set several years after the events of
Avatar, Sully is now chieftain and Neytiri high priestess of their clan – although events will apparently focus on their children. They'll also be journeying beyond the forests of Pandora into underwater and volcanic video game levels environments."
http://www.digitalspy.com/movies/avatar/feature/a785456/avatar-2-release-date-plot-cast-and-everything-you-need-to-know-about-james-camerons-long-awaited-sequel/
This actually sounds pretty good.