Superman Jr. of Earth-E
From superman.nu: Supermanica
Superman Jr. of Earth-E
Superman Jr., who's secret identity is Clark Kent Jr., is the super-son of Superman. On Earth-1 however, he is nothing more than a character in a computer program. Just as Superman formed the world's finest team with Batman, so too did Superman Jr. team up with Batman's son, Batman Jr. to form the team of the Super-Sons (WF No. 215, Jan 1972: "Saga of the Super-Sons!").