After returning to DC Comics in 1986, he became the editor of the various Batman titles and served in that capacity until 2000. In February 1987, O'Neil began writing "The Question" ongoing series which was primarily drawn by Denys Cowan. Between the years of 1988 and 1990, O'Neil would return to "Green Arrow" writing the "Annual"s alongside the main title. Because he was also in charge of "The Question", he would appear in all three "Annual"s that he wrote. The ' series began in 1989 with the five-part "Shaman" storyline by O'Neil and artist Ed Hannigan. "Armageddon 2001" was a 1991 crossover event storyline. It ran through a self-titled two-issue limited series and most of the "Annual"s DC published that year from May through October. Each participating annual explored potential possible futures for its main characters. The series was written by O'Neil and Archie Goodwin and drawn by Dan Jurgens. He and artist Joe Quesada created the character Azrael, who was introduced in the four-issue miniseries "Batman: Sword of Azrael" in 1992. That same year, O'Neil wrote the "Batman: Birth of the Demon" hardcover graphic novel. Another DC one-shot issue that O'Neil wrote in 1992 was '.