So I've been fascinated by his character for a while and I felt dissapointed with his fate with Joker. Even so I can't help but wonder what if the Designer that met Batman's rogues wasn't the real Designer? Especially since when his mask was removed his face wasn't shown I can't help but wonder if it was a henchman and the real Designer was monitoring everything from a safe location. My main theory is the detective he defeated and he are in fact one and the same person and that will slowly be revealed in time.