Prometheus was a super-villain who swore to destroy justice in any form. His vendetta is a twisted parody of Batman's origin. He was the son of criminal parents and witnessed their deaths at the hands of the police. Years of traveling the world and training made him one of the most dangerous men alive. Throughout his career, he was a threat not only to the law enforcement agencies that killed his parents, but also to superheroes, especially the Justice League. He is famous for cutting off Roy's arm and destroying Star City. He had also been a member of the Injustice Gang.
Adrian Chase (born Simon Morrison) was Star City's district attorney who worked closely with the mayor, Oliver Queen. Adrian secretly operated as "Prometheus", a mysterious archer, who leads a campaign of revenge against the Green Arrow, enacting pain and penance on Oliver Queen for all the lives he unknowingly ruined while hunting down people from the List in his guise as the Hood. His main motivation is suspected to be related to the death of Justin Claybourne, with Prometheus possibly being his illegitimate child, although the villainous vigilante refused to confirm this suspicion. Targeting civilians and police officers, Prometheus recreated anagrams of people from the List that the Hood targeted, and also recreated a crime scene of Claybourne's bodyguards killed by Hood with the corpses of murdered SCPD officers.
- Prometheus' uncredited voice was provided by Michael Dorn who also voiced Kalibak in the DC Animated Universe.
- In the comics, Adrian Chase was the second version of Vigilante while Prometheus had three incarnations including an unnamed person, Curt Calhoun and Chad Graham. But on Arrow, Prometheus was reimagined as a dark mirror version of Green Arrow similar to Malcolm Merlyn with Adrian Chase's name being used as the identity of Simon Morrison.
- Prometheus was depicted a dark green minifigure in the game unlike his physical counterpart whose suit is mostly blackened green.
- LEGO DC Super-Villains (DLC)