@maidiebike: That would be ideal, but there's the challenge that your followers came to you blog for that first reason (Superman comics) and not for the second (like, say, if the guy also loved classic cars).
I guess another example I could cite was this one guy who took images from Slylock Fox and crafted them into a film noir narrative. (I think Bob Weber, Jr., the creator of the Slylock Fox comics, was a bit of a fan.) The blog got a bit of a boost when popular comic humor site The Comics Curmudgeon featured it in one of their posts. (Heck, for all I know, that's exactly what he did, but he didn't post anything on his site indicating he'd started a new blog or something.)
But you could tell he was getting burnt out by the later entries, so he rebooted the blog into a poetry one. That one didn't last long. I think it was partly because the fans of Slylock Fox-related humor weren't coming back, and it was probably difficult operating in that vaccuum when you're used to having a community built around your earlier material.
You could argue that the blog belongs to the writer, and that he should have a right to turn it into whatever he wants to turn it into, and that would be true. But after a while, you also forge something of a relationship with the readers, and to not deliver the content that they keep coming back for feels a little like betrayal.