Man, the effects are mind blowing, but don't act like that story hasn't been told at least a thousand times before.
well.. it's a generic story which I think was devised so that more people could relate to it and understand it to broaden the appeal of the movie. he spent a lot on making this film.. it was an investment which needed to be recouped.. and that may be jeapordised if he made a very complicated plot. i think he struck a good balance in appeasing to the general crowd, but also including many things which will slip by most people.
there's a reason why people see it more than once and pick up on things which they didn't previously.