There are several fanfics that feature children fathered by Lord Nor and his followers on earth women.
Suppose during the Nightfall incident the New Kryptonians rescued an unconscious Clark in space moving in a trajectory that would have taken him away Earth.
Now twenty years later a number of young Super people begin to appear.
Lets make this a AltVerse Clark who never met Lois Lane, became Superman while elsewhere in the world and since his parents are dead had no strong need to return to Earth.
