I hear ya there, but there have been movies that gave that much sugary goodness in their teasers and trailers and yet still had lots of surprises left over. And James Cameron has been good at surprises. I'm optimistic and this is on my 'to see if its the last thing I ever do' list.
I'm kind of hoping to make it to the showing still as oblivious to what's going on as I am now. -crosses fingers-