Paul Dini is a multiple Emmy and Eisner Award-winning writer and producer who has helped redefine the legends of the DC Universe in such series as The New Batman/Superman Adventures , Batman Beyond , Krypto the Superdog , and Justice League Unlimited . In doing so, he co-created one of the most popular characters in comics in Harley Quinn, who originated as a character in Batman- The Animated Series . In comics he has authored The World's Greatest Super-Heroes , illustrated by Alex Ross. Dini has also collaborated with Chip Kidd on Batman Animated for HarperCollins.