whoa!
It was like I was browsing Amazon for a second there!!
I think it's more or less common knowledge that there, at some point, is some kind of a show down between Obi-Wan and Annakin, that leaves Annakin in a barely human state. It's popular belief that this occurs on/in a volcano - most episode 3 fan art tends to depict this image/scene.
Should be good whatever george decides
Lucas may change this to set Star Wars apart from another popular film trilogy, the climax of which will also feature a volcano. Just a thought... not speculation Kane, not a recommendation either - just a realistic possibility given the two movie franchises are now unfurling (to cinema-goers) simultaneously.