What I can say, I think, is that a movie like this should in some sense be accessible to a non-fan like myself. I realize every TV cartoon show has a cadre of fans who grew up with it, have seen every episode many times and are alert to the nuances of the movie adaptation. But those people, however numerous they are, might perhaps find themselves going to a movie with people like myself--people who found, even at a very young age, that the world was filled with entertainment choices more stimulating than "Scooby-Doo." If these people can't walk into the movie cold and understand it and get something out of it, then the movie has failed except as an in-joke.