Superman deals with an alien beast and its hunter in Action 519 (May 1981).
Conway, Swan and Chiaramonte helm this tale. Superman gets alerted about signals of approaching aliens. One has come intentionally, to stop a intergalactic beast that stopped here first.
Superman has his doubts, even when the beast shows up, in the Grand Canyon.
It’s a rare story, in which Superman is wrong. The hunter is exactly who he claimed to be, simply here to defeat the monster.
Aquaman’s origin, and that of Atlantis, are retold in a different light in this story, by deMatteis, Len Wein and Heck.
Poseidon claims to be Aquaman’s human father, and explains his story to his son and Cal Durham. Atlanna is given a sister, and her period on land, and the birth of Aquaman, are placed shortly after the city’s sinking, in contravention of every other version of this tale. Atlanna has used Atlantean tech to turn her supposedly dead husband into Poseidon, as well as creating robots of Aquaman’s various enemies. She is portrayed as murderously insane.
Ocean Master consistently refers to Atlanna as his mother through this storyline, which is very odd. He has always, to this point, been the son of Aquaman’s father and a human woman.
The story concludes in the next issue.