The one-bullet-for-one-settler third act was impressive, but there was little new here. James Cameron, who has now shut everyone up forever, is over-emphasizing sensory immersion and love of environmentalism at the expense of story innovation. (The exception is his well-delineated complexity of one character’s insider-outsider strategy.) The political has to compete with the personal. This reviewer will probably skip the bathroom break and sit out on Nos. 3 through 5.