It's not "Liberalism" that's hurting comic book sales -- it's lack of imagination

Over at Bleeding Cool, someone called Darin Wagner thinks he has hit upon the primary reason that comic book sales have been steadily declining. And as it turns out, he has actually hit upon the primary reason that comic book sales have been steadily declining, and he stumbles into it in the second paragraph of his essay:
You pick up a superhero comic book featuring a childhood favorite of yours,