Dennis O'Neil began his career as a comic-book writer in 1965 at Charlton, where then-editor Dick Giordano assigned him to several features. When Giordano moved to DC, O'Neil soon followed. At DC, O'Neil scripted several series for Giordano and Julius Schwartz, quickly becoming one of the most respected writers in comics.

O'Neil earned a reputation for being able to "revamp" such characters as Superman, Green Lantern, Captain Marvel - and Batman, whom O'Neil (with the help of Neal Adams and Giordano) brought back to his roots as a dark, mysterious, gothic avenger.

Besides being the most important Batman writer of the 1970s, O'Neil served as an editor at both Marvel and DC. After a long tenure as Group Editor of the Batman line of titles, he retired to write full-time.

Frank Miller began his career in comics in the late 1970s and rose to fame while first drawing, and then writing, Daredevil for Marvel Comics. He was also the creative force behind Batman: The Dark Knight Returns, Batman: Year One and Batman: The Dark Knight Strikes Again. His many works have not only redefined classic characters, but also, on a few occasions, revitalized the comics industry. His multi-award-winning graphic novel 300 was brought to full-blooded life in the 2007 motion picture of the same name, and in 2008 he directed the feature film Will Eisner's The Spirit. His creator-owned crime saga Sin City first hit the page in 1991, and then the silver screen in 2005, with Miller on board as co-director with Robert Rodriguez. The two returned to direct the sequel Sin City: A Dame to Kill For, released in 2014 and featuring two new stories by Miller. In 2015 Miller returned to his bestselling series with the highly anticipated Batman: The Dark Knight: Master Race.