Nearly every story told today has been told a thousand times before it all the way into prerecorded history. Like startups, a movie is IMHO about execution - it is very much not about what the story is, but rather who tells it, and how it is told.

I'm personally excited - there were a lot of detractors and doubters, and I was one of them. I'm glad Cameron has defeated all the nay-sayers and made something grand; I for one will be sure to see it.