I don't think you can replaces great themes. But I think people do want to hear fresh arrangements of them. They don't want to hear them played the same way all the time.
Life is too full of distractions nowadays. When I was a kid we had a little Emerson radio and that was it. We were more dedicated. We didn't have a choice.
I've wanted to do it for years, but every attempt at it has turned into another tune. We have actually taken a different approach, we're doing a lot of sampling - we're even sampling bits of Flash!