Created by writer Grant Morrison and penciller Arnie Jorgensen, the most recognized version first appeared in New Year's Evil: Prometheus (February 1998).

[2] On The CW's live-action Arrowverse TV series Arrow, the character was portrayed by Josh Segarra and voiced by Michael Dorn.

Writer Mike Conroy noted "...with his technologically advanced armor and weapons arsenal, which can download the fighting techniques of the world's top martial artists...he (Prometheus) turned out to be a formidable foe, as the JLA found out".

Assuming the "Prometheus" alias, the reluctant Calhoun fights alongside Hybrid in an unsuccessful attempt to defeat the New Teen Titans.

This traumatic experience causes their son's hair to turn white, and he vows to "annihilate the forces of justice" to get revenge for his slain parents.

[7] Using his parents' hidden caches of money, the son travels the world and develops his skills, becoming an underground pit-fighter in Brazil and a mercenary in Africa, and joining terrorist groups in the Middle East.

After avenging his parents' deaths by murdering the police officer who shot them, he locates the Himalayan city of Shambhala, inhabited by a sect of monks that worshiped the concept of evil.

[8] Initially, the plan appears to be successful, with Prometheus infecting Steel's armor with a virus, hitting the Martian Manhunter with a dart containing a toxin that destabilizes his ability to control his shape, knocking out Huntress, trapping Zauriel in the Ghost Zone, beating Batman senseless using downloaded skills, using neural chaff to disrupt Green Lantern's will, and manipulating the Flash into believing that the tower is rigged with bombs that will detonate if he moves too fast.

Prometheus is then caught off guard by the anti-hero Catwoman (who is disguised as journalist Cat Grant), allowing the heroes time to recover.

During the confusion caused by the arrival of the weapon Mageddon, Prometheus is able to use a White Martian space vessel abandoned in the Ghost Zone to infiltrate the Watchtower and attack Oracle.

Upon Martian Manhunter's death at Libra's hands, Prometheus's mind was restored and he tracked down Chad Graham, killing his would-be protégé and maiming/murdering members of the Blood Pack super-hero team.

[12] A spate of superhero deaths (Freedom Beast and Gloss) and attacks on others (Barry Allen, Batwoman, and Crimson Avenger) is revealed to be the work of the true Prometheus.

After defeating the JLA and the Teen Titans by reading files on them, Prometheus is captured by Donna Troy and beaten brutally, until being stopped by the Shade.

[12] The third version relies on the use of two pistols, although he also possesses his mentor's helmet and artificial skills, giving him the training to defeat even Lady Shiva in a matter of seconds.

Prometheus possesses no superhuman abilities, but has undergone intense physical and mental training and utilizes an extensive range of equipment and technology like the hero Batman.

Common tools include body armor, gauntlets that fire various projectiles, a side-handle baton with several technological features, and a helmet that in addition to emitting strobe lighting capable of disorientation and hypnotism, can download the knowledge and physical skills of others directly into his brain via a compact disc, his default disc including the skills of thirty of the world's greatest martial artists.

The 'battlesuit'/helmet combination is also equipped with an artificial Intelligence that can rapidly calculate and deploy a variety of strategies and countermeasures that have allowed Prometheus at various times to incapacitate entire groups of the Justice League singlehandedly and simultaneously.