Paul Levitz continues his 21st century run on DC's most famous 31st century team, the Legion of Super-Heroes! Cosmic Boy, Saturn Girl and Lightning Lad. These three heroes began the formation of the Legion. But why was the organization known as the United Planets formed? Who tried to kill R.J. Brande the first time? What great power could leave entire planets desolate and lifeless? Though these questions have remained unanswered for years, SECRET ORIGIN will uncover the until-now untold details of one of the greatest super-teams of all time! The man who knows the Legion of Super-Heroes best, Paul Levitz, along with artist Chris Batista, bring you one of the most exciting and pivotal Legion stories to date!