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In pursuit of the time-traveling criminal known as Universo, the super-powered kids from the 30th century travel back to the 1960s to enlist the aid of the "greatest teen superhero ever"--Robin, the Boy Wonder! But Batman's hard-boiled nemesis Egghead has stolen one of the Legion's unattended time bubbles and taken off to the 2900s. Looks like Batman has to head to the far-flung future with one group of heroes while Robin stays in the swinging sixties with another. Holy time-travel paradox!