First appearing in their eponymous series, Justice League United #0 (published in April 2014 and cover-dated June 2014), the team features Animal Man, Equinox, Green Arrow, Martian Manhunter, Stargirl, Supergirl, Adam Strange and his partner Alanna Lewis.

The team forms in the aftermath of "Forever Evil", following the disbandment of the United States Government-sanctioned Justice League of America.

Justice League United began its development in the summer 2013 after "Forever Evil" was to be finished during its run at the time.

[1] Animal Man became a part of the team, when his eponymous solo title was canceled in December, which was also written by Lemire.

[3] The team's Canadian addition was revealed to be Miiyahbin Marten, a 16-year-old Cree teen from Moose Factory, with the codename Equinox.