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.

Neron is a demon-lord of Hell and was first featured as the major antagonist in the multi-title crossover event Underworld Unleashed, released Comics in 1995.

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.

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,[2] 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.

[6] It is not known how old he is, but he has claimed "I brought the very first couple together"[7] and he has told Wonder Woman "I am among the first that walked abroad in this universe, and my influence has been known since humanity's first fall from grace".

Neron appears to be unable to resist a chance to make a deal; he is attracted to deal-making to corrupt and gain souls.

When seen from the sky, the flames from the five explosions resemble the points of a pentagram and the symbol, combined with the deaths of the five Rogues Gallery members, creates a gateway which enables Neron to travel to Earth and to corrupt humanity.

James Montgomery Jesse) and the most powerful members of Justice League America, including Captain Marvel, though not before causing mass chaos and worldwide destruction, killing the alien tyrant Mongul I with his bare hands and sending away unharmed a large number of supervillains who had rejected his offer.

Neron refuses the offer for the Flash III's soul and asks for his love for news reporter Linda Park instead because of its purity.

Neron had planned all of this to use the Speed Force to both enter into, and to rule, Heaven,[16] but the plan backfires and the essence of the Flash III and Linda's love corrupts him, causing him to feel pity and compassion for the damned souls in his realm for the first time in his existence without understanding why and forcing him in utter desperation to frantically offer the couple another deal to take their love back.

[17] Immediately after this, he captures Wonder Woman and Artemis of Bana-Mighdall in Hell as part of a plan to bring about the defeat of his enemy, Etrigan the Demon.

[22] Immediately after this, he is once again defeated by the Trickster with the help of the five Rogues Gallery members whom he had been involved with twice before, the Pied Piper and Billy Hong, a 12-year-old boy who is also the Majee, a special agent of the Saravistran god Mestra sent to observe and weigh humanity's progress.

[6] To win back his position in Hell and regain his full powers, Neron next travels back into the past three times to collect three previously-dead superheroes' souls at the time of their deaths: Barry Allen (who had died in the Crisis),[25] Jason Todd (who had been killed by the Joker)[26] and Superman (who had been killed by Doomsday).

He then turns his attention to Green Lantern II, tricking Deadman into saving Hal Jordan from death in the past during his battle with Mongul,[28] ensuring that Neron will have the chance to tempt Jordan later in his history (after he has become Parallax II) and thus succeed in winning back his position in Hell and regaining his full powers.

[32] Under thrall to Neron, Felix Faust plots to deliver him the Elongated Man's (Randolph William "Ralph" Dibny) soul at the moment of its greatest despair.

Neron is next opposed by the demon siblings Blaze and Satanus, the rulers of Purgatory, who attempt to take control of Hell while he is imprisoned in the Tower of Nabu.

To defeat the legions of the damned, Neron has Lilith the Mother of Monsters recall all of her monstrous children to Hell to fight on his side.

Despite all of this and just when Neron seems to be victorious, he is killed by Satanus, who had used the war as a cover to infect Hell with a modified airborne viral variation of DMN, a magical drug that normally changes humans into monsters but, in this variation, changes demons into soulless humans when combined with the speaking of the magic word "Shazam".

The Underworld Unleashed crossover event is also revealed in this story as being canon in this version of the DC Universe and is said to have occurred in the 1990s.

[42] Inhabiting Desmond's body, Neron caused trouble for the Legends through his partnership with Time Bureau funder Hank Heywood.

[43] When Hank had a change of heart about their plan and tried to back out of it, Neron killed him and eventually took Legends member Ray Palmer as his new host.