The Orion referred to is actually based off the comic book character of the same name. Orion was the son of Darkseid who was swapped with Scott Free(Mr. Miracle) and raised by Darkseids counterpart High Father on New genesis as part of a peace treaty. Scott was then raised by Darkseid on Apokolypse.
This episode introduces a round table of villians that appeared as members of The Legion of Doom: Black Manta, Captain Cold, The Toyman, and a m taller figure with white hair in the shadows that resembles Solomon Grundy; all four are members from the Challenge of the Super Friends Saturday Morning Cartoon.