A scenario idea can begin with just two words. In this case, the two words were: Vampire Superman. That’s a combination far too temping to ignore when it gets into your head, an impossible blend of a Child of the Night and a Child of the Sun, a being of unimaginable power and unrelenting evil that….. Wait. I’m getting ahead of myself. Let’s start …

The rest is here:
Who is Sleeping in the Crypt Tonight?