James Cameron finally returns to Pandora with Avatar's long-awaited sequel, which explores its seas. Was its 13-year germination worth it?

I’ll admit it: for all its visual splendor, Avatar didn’t really click with me. But the reason why isn’t what you’d think. Confessing time…

When it came out in 2009, its 3d visuals and expansive world-building swept people off their feet. Does it make this a masterpiece? Well...