4. Bedbug
Paul Dini has created a ton of great Batman villains, too many to list here, but some of his lesser-known Bat-tagonists have been unfairly forgotten about. Bedbug is such a character. Bedbug first appeared in the story House of Hush, written by Dini and drawn by the awesome Dustin Nguyen. The character is depicted as a gaunt, emaciated and thoroughly disgusting person covered in bedsores and crawling with insects. He wears a bedsheet and little else besides a bizarre, bug-like helmet (a helmet that is filled with bugs, by the way. Yeah, I know, thats exactly what I thought...). Bedbug has the ability to control anyone bitten by his bugs, but only when they lose consciousness or go to sleep. He then dictates that his sleepers commit crimes of his choosing. Once bitten, a potential 'sleeper' can become active at literally any time after a long day and a warm cup of Horlicks, but it could take years for Bedbug to activate them. Thus, his agents are sleepers both literally and figuratively. Because of this, Bedbugs power level is potentially catastrophic and, unlike Clayface (a character so mind-numbingly stupid that he has yet to realize that he could, at any time, absorb himself into the earth, discover the Batcave, and them embark on killing and replacing Batmans allies one-by-one), he seems to be acutely aware of the magnitude of his power. In his debut appearance, Bedbug manipulated both a sleeping Harley Quinn and The Penguin, as well as almost killing Batman and Catwoman. After that, he decided to lay low for a while and quietly build up his sleeping army. A thoroughly creepy (not to mention abjectly nauseating) character, Bedbug is just crying out for further development and a major-league showdown with The Dark Knight. His only other appearance was in the Arkham City video game tie-in comics, so he has technically appeared twice, but since that series isnt related to the regular comics (and I really wanted to write about Bedbug), Ill let it go.