Get-a-Life Boy saysAs the title indicates, this is basically a wrap-up of the Superman story arc; the Legion has come back in timebto witness the moment that the United Planets is founded (aka Unity Day). They're all "very excited and loopy from the time travel," and Brainy's miscalculation caused them to arrive four minutes early. So the Legion of SUper-Heropes becomes part of the celebration of the first Unity Day.
The Legionnaires invite Superboy (Jon) to come to the 31st century for a visit, and give him a day to thinik it over. They'll return to him on Earth the next day. Then they fly off into the timestream.
