But the second trilogy certainly had a built-in audience.
Yeah, everyone says the second trilogy was a slam dunk. But there was a lot of controversy around here about the fact that I wasn't doing the obvious -- I wasn't doing the commercial version of what people expected. People expected Episode III, which is where Anakin turns into Darth Vader, to be Episode I. And then they expected Episodes II and III to be Darth Vader going around cutting people's heads off and terrorizing the universe. But how did he get to be Darth Vader? You have to explore him in relationships, and you have to see where he started. He was a sweet kid, helpful, just like most people imagine themselves to be. Most people said, "This guy must have been a horrible little brat -- a demon child." But the point is, he wasn't born that way -- he became that way and thought he was doing the right thing. He eventually realizes he's going down the dark path, but he thinks it's justifiable. The idea is to see how a democracy becomes a dictatorship, and how a good person goes bad -- and still, in the end, thinks he's doing the right thing.
I'm not sure what he means by "not doing the commercial version" because alot about SW is about commercialism. In any case I think the results on the screen do not reflect what he is saying his goals were. I would say he failed (perhaps miserably) to show precisely what he is describing i.e. the gradual turning of a character into an evil person in a believable way within the context of the science fiction universe he created.