Superman #147

Cover Story: Lex Luthor builds a contraption in prison that allows him to contact people from the future. He ends up meeting the Legion of Super-Villains: Cosmic King, Saturn Queen and Lightning Lord. They are a three-member team that opposes the Legion of Super-Heroes as adults, particularly Saturn Woman (who is Saturn Girl as an adult), Cosmic Man (who is Cosmic Boy as an adult) and Lightning Man (who is Lightning Lad as an adult). Superman and this adult version of the Legion of Super-Heroes defeats the Legion of Super-Villains and returns everyone to jail, except Saturn Queen who ends up renouncing evil.