Neron is a supervillain appearing in various American comic book stories published by DC Comics. He first appeared in Underworld Unleashed #1 (November 1995) and was created by Mark Waid and Howard Porter. Neron made his first live appearance in the CW TV series Legends of Tomorrow, serving as the main antagonist of season 4 and being portrayed by Christian Keyes and Brandon Routh. Publication history Neron is a demon-lord of Hell and was first featured as the major antagonist in the DC Comics multi-title American comic book crossover event Underworld Unleashed released by DC Comics in 1995. After this introduction, he was next used in several storylines simultaneously: The Flash (vol. 2) #125–129 (May–September 1997), by Mark Waid and Brian Augustyn, Wonder Woman (vol. 2) #123–127 (July–November 1997) by John Byrne and a two-part story in JLA #6–7 (June–July 1997) by Grant Morrison, with art by Neron's co-creator Howard Porter. The last storyline was concluded in the three-issue miniseries JLA: Paradise Lost (January–March 1998). Neron next appeared in New Year's Evil: The Rogues #1 (February 1998), a part of the DC Comics storyline "New Year's Evil" that ran in eight one-shot issues, followed by "Infernal Villains: Etrigan Meets Neron", a two-page vignette featuring the first meeting of Neron and Etrigan the Demon in the one-shot anthology issue DCU Villains Secret Files and Origins #1 (April 1999) and ended the year with a part in the five-issue weekly series Day of Judgement (November 1999) and a stand-alone tale by J.M. DeMatteis, "Heart of Hell" in Superman: The Man of Tomorrow #15 (fall 1999), the last issue of that series, which is part of the Day of Judgement crossover storyline and the first of two issues published after the storyline was over that concludes it. His next appearances were in the five-issue weekly series Deadman: Dead Again (October 2001) written by Steve Vance, a humorous Christmas story called "Merry Christmas, Justice League – Now Die!" in JLA #60 (January 2002) and a brief encounter in "On Duty In Hell" in Human Defense Corps #6 (December 2003), the last issue of the six-issue miniseries. Two years later, he was featured in the last four parts of the six-part storyline "Out of the Past" in Richard Dragon #7–12 (January–June 2005), then during the DC crossover event 52, Neron was involved in Week 25 (October 25, 2006) and Week 42 (February 21, 2007), followed