Elong
The fire rises
Big, expensive hollywood films are only made to make money. There's no 'art' to them.
So the studios use the same stories, ideas, actors, directors etc. because they know people will watch them and they don't want to take any risks.
This is very telling of the latest Hobbit movie. The Extended Edition which Peter Jackson releases later in the year will contain about 30 minutes of additional footage, not for the sake of it, but because it was cut due to New Line wanting the movie to be shorter so they could squeeze more showings in and make more cash.
The Extended Editions are much better versions, and through them plotlines actually make more sense. Kingdom Of Heaven was another movie that got panned when it was first released, but it was heavily cut and didn't make sense. The Director's Cut is far superior.