I am surprised no one has mantioned the Mines of Moria. I think that is ready made for a dark ride. And I think a water ride seems to be a natural fit for a lot of the LOTR. But I am perplexed as to how they would present places like Rivendell, Helms Deep, Minus Tirith, or even The Black Gate of Mordor. I think that the only way to do something with those locals would be some sort of Soarin' 3D screen based attraction. And the only flying that takes place is on a Giant Eagle.