The "Avatar" movies and the "Lord of the Rings" trilogy have more in common than characters who say "I see you" (maybe Sauron has some Na'vi ancestry). Both were largely filmed in New Zealand, and both were made in collaboration with cutting-edge visual effects studio Weta Digital, now known as W?t? FX. And when it came to filming his "Avatar" sequels, director James Cameron took a leaf out of Peter Jackson's book and shot the movies back-to-back, with "Avatar: The Way of Water," "Avatar...