Those are some awesome ideas, the kind of ideas that could put that new feel to an already dark film. But, these will be tough, and it would take alot of time.
Bingo's idea would explain everything and it would give you a sick feel to your stomach watching the films 1-6.
But wouldn't Bens line in ANH "A young Jedi named Darth Vader, who was a pupil of mine until he turned evil" give it away? Or at least the idea of it.
Now that is the best idea I have ever heard. It would also explain why his acting is soo unstable. He should really seem crazy. He already does!!!
If GL directed the movie with Bingo's idea in mind, Hayden would of won an Oscar. :)