He co-created the characters Firestorm with artist Al Milgrom and Steel, the Indestructible Man with artist Don Heck in the premiere issues (both March 1978) of the respective titular comics. Two other Conway co-creations, the Deserter (with artist Dick Ayers) and the Vixen (with artist Bob Oksner) were scheduled to receive their own series as well but were canceled before any issues were published. He additionally co-created the characters Vibe and Gypsy. As writer of "Batman" #337–359 (July 1981 – May 1983) and the feature "Batman" in "Detective Comics" #497–526 (Dec. 1980 – May 1983), he introduced the characters Killer Croc and Jason Todd, the latter of whom became the second Robin, succeeding original sidekick Dick Grayson. With artist Gene Colan, Conway revived the Golden Age supervillains Doctor Death in "Batman" #345 (March 1982) and the Monk in "Batman" #350 (Aug. 1982).