Seven years is an eternity in the entertainment business, and that’s just how long it’s been since James Cameron’s Avatar arrived on the scene and did some rather boffo box office (as in biggest box office in movie history). But a lot has changed since then, movies come and go, and the public consciousness is fleeting. Still, Cameron is pressing on with four planned sequels, and now we have more news of Disney involvement. Pandora — The World of Avatar is opening next summer at Disney’s Animal Kingdom at Walt Disney World in Florida. No specific date has been announced yet.