(In which I attack a legend)
After their first appearance in Adventure #247, readers had to wait 20 months for the Legion to return, and, well… they were dicks. Dicks in a really bad story, to boot.
Short version: Three of Superboy’s missions are interrupted in turn by members of the Legion, who show him up and then snub him. The people of Smallville turn on him, including his own parents. Tearfully, he packs up to leave, and receives an invitation to come to a place called Superboy World, a planet where everyone loves him. But it’s a dodge—the planet is run by the Legion, who now despise him, and Superboy is locked up in a Kryptonite prison for life.