I did a Batman just for the heck of it. I don't know why. I don't ever expect my phone to be ringing off the hook to draw superhero stuff, but I could see me doing a Batman story (duuhh, typical answer) maybe. But i'd like to do it only if I can make it really filthy, grimey, ink-splattered dirt-scumy all over the page, Like Batman in Detroit.
I also have to learn to color in Photoshop like a normal human being someday.