"If Anakin killed Vader and took over his persona you could have both ideas reconciled."
See, I was half expecting something a bit like this in some way (not exactly that, but some sort of twist at any rate), to take place in the prequels. What we knew about Obi-Wan and Vader's past and the Clone Wars was very vague. George could have really taken the thing any which way he wanted. He made such a big deal about shocking twists in the first two Star Wars sequels, it was kind of surprising the best he came up with was "Padme was the queen this entire time!!! Whooooa!!! What a twist!!! 8O"
The prequels are a product of a very limited imagination. There is really nothing creative or fresh (what defined the first two films) about them.