Originally Posted by
Doctor Bifrost
The funny thing is, Man-Bat was always a "scientific" character. Kirk Langstrom was a brilliant (but imperfect...) scientist who created a serum for what he thought was good purposes, but which had the side effect of turning him into a raging man/bat hybrid. I think they moved him into JLD because he looks like something out of a horror movie, but it's not a natural fit.
(You could say similar things about the Swamp Thing, but once you got the Parliament of Trees involved, he went full mystical.)