By November 1987, Orion had greenlit development of a sequel targeting a PG-Rating that would allow children to see the film unaccompanied by adults, and tying into the 12-episode animated series "RoboCop", which was released by Marvel Productions in 1988. Neumeier and Miner began writing the film but were fired after refusing to work through the 1988 writers strike, and were replaced by Frank Miller, whose second draft was made into "RoboCop 2" (1990), and his first draft became the second sequel "RoboCop 3" (1994). Weller reprised his role in the Irwin Kershner–directed first sequel, which was released to mixed reviews but financial success.