Negan is a special kind of horrible. As one of the few true nemeses Rick encountered in his time surviving the zombie apocalypse, Negan's earned a spot among the fandom that few characters from The Walking Dead ever attain. Say what you will about the Governor, but Negan makes that guy look like nothing more than an annoying gnat. There was just something about the ruthlessness in Negan's rule that made him someone to truly be feared, not just a guy working well above his pay grade in running a town of other survivors.
With such fervor for the character, it made sense that Negan would eventually make the leap to the television show. First however, he'll be getting a resin statue from McFarlane Toys.