I would think making movies for general audiences would be a lot easier than making movies just for the fans. With the general audience, they're just going to be looking to have a good time watching the movie, but the fans are going to be going analyzing every single detail down to the frame. General audiences are pretty easy to please, but with the fans, no matter what you do, one segment of the fan base is going to be pissed.
I think it's best to just say, screw the fans, and make the movie or show that you want to make, and hope that enough people, fans and otherwise, enjoy it for it to be successful.