 Wolfman wanted to make the series unforgettable; he said that many writers had expressed interest in simplifying DC's continuity and he wanted to be the one to do so.Pérez says he was not the intended artist for "Crisis on Infinite Earths", but was excited when he learned about it, seeing it as an opportunity for "revenge" against Marvel, which he blamed for blocking the "JLA/Avengers" crossover he had been working on.He enjoyed working with Wolfman again, and took a leave of absence from "The New Teen Titans" to draw the series.