862. Superman and the Legion of Super-Heroes (Part V of VI) - Revenge of the Rejects

Superman suggests the Legionnaire Subs ought to join the fight, reminiscing his childhood days and how he felt just like the substitutes when he was in Smallville. Brainiac 5 reveals ever since the Justice League drove the Legion underground he's had them at the ready but lacked the confidence to send the subs into such a deadly mission.