The Infinitus Saga begins as the Legion of Super-Heroes arrive with the shocking news that the 31st century has been destroyed! Now it's up to the Justice League United to save the future! Complicating matters is the fact that Multi is a young innocent in the current time period, forcing the Justice League United to stand in the Legion's way! Collects JUSTICE LEAGUE UNITED #6-10, JUSTICE LEAGUE UNITED ANNUAL #1, JUSTICE LEAGUE UNITED: FUTURES END #1, JUSTICE LEAGUE: FUTURES END #1.