Created by Grant Morrison, the team first appeared in the final page of JLA #23 (except The Flash, who was created by Mark Waid and first appeared in Flash 50th Anniversary Special (1990)).

In the 853rd century the institutions of the Justice League of America (JLA) and the Legion of Super-Heroes have developed into the Justice Legions, various teams of superhumans who act to protect the Milky Way galaxy.

During the Convergence storyline, the Metropolis of the 853rd century is among the cities within different domes on Telos.

When the domes came down, the Justice Legion ended up engaging the Crime Syndicate in battle which starts with Superman being attacked by Ultraman.

[1] Justice Legion Alpha is made up of future analogs of modern heroes.