The new "Avatar" sequel is... a lot.  A lot of pretty.  A lot of time.  A lot of CGI.  A lot of effort on all parts.  Well, all except for the story.  The story is a significant disappointment.  The story, which somehow tends to get a pass when the movie is discussed, sinks the whole endeavor.  It isn't that the memory fails to be mesmerizing, it's completely astounding on a visual level, it's just doesn't work on a story one.