Brimstone (DCAU)
From Pop-Cult Guides
Brimstone is an artificial creation also dubbed the "Engine of Destruction", sent by Darkseid of Apokolips to Earth. He first appeared in the DC Comics miniseries Legends in 1986. Brimstone was actually a diversion for the heroes of Earth so that Darkseid's agent, Glorious Godfrey, could seize political power and gain persuasion to turn the people of Earth against the planet's superheroes.
A monstrous creature, unnamed but obviously based on Brimstone's character design, appeared in the first episode of Justice League Unlimited, "Initiation". This creature was a mindless, out-of-control, nuclear powered creature created by a totalitarian country resembling North Korea. Green Arrow stops the creature by shooting a "containment rod" into a nuclear reactor located on its chest, allowing Supergirl to destroy it. With the idea of Apokolips selling its technology to unscrupulous Earthlings having been presented both in comics and on Superman: The Animated Series (considered to be a direct predecessor to the two Justice League animated series), it could be possible that the creature's creators bought the technology responsible from Apokolips, though this was never explicitly stated in the episode.
