 Remender and his co-writer Cullen Bunn developed the new character, with Bunn developing the idea of multiple Crime Masters existing throughout history.Thompson found an arch-rival in the new Jack O'Lantern, developed by Remender and artist Tony Moore.Remender decided that making him a parallel of Thompson would create a stronger nemesis; therefore, Jack was also given a traumatic childhood in which he was exploited by Crime Master.