DC Comics Superman and the Legion of Super-heroes Graphic Novel (VOL 73)

SUPERMAN AND THE LEGION OF SUPER-HEROES Originally published as Action Comics #858–863, December 2007–May 2008.

After responding to a distress call, Superman journeys to the 31st century to save the greatest friends he has ever known: the Legion of Super-Heroes. In this future, the Man of Steel’s legacy has been warped to ignite terror throughout the cosmos. The Legion are wanted criminals, war between Earth and the united Planets is imminent, and the “peacekeeping” of the xenophobic Justice League of Earth only brings it closer... To end this tyranny, Superman must rescue the Legion of Super-Heroes, and with their help, continue his never-ending fight for truth, justice and the intergalactic way!

ADVENTURE COMICS #247 Originally published in April 1958.

A young Clark Kent is amazed to meet a trio of teenagers who know his secret identity as Superboy. The group introduce themselves as the Legion of Super-Heroes, who have travelled from the 30th century to offer him membership to their Legion.