In the fifth and most important film in this universe so far, the introduced heroes, along with others making their debuts, unite to stop the threat of Steppenwolf, forming the Justice League. Years ago, after a failure, Steppenwolf was banished from his home by his ruler, the powerful and feared Darkseid. As a chance for redemption, he sets out in search of the Anti-Life Equation to deliver to his nephew. This quest leads him to Earth, where he finds a Mother Box, ancient technology of the New Gods. Now Batman, Superman, Wonder Woman, and Green Lantern begin to deal with incidents involving this quest, appearances of pandemonium, and Steppenwolf himself. Realizing that this is a crisis they cannot handle alone and that the consequences of failure would be greater than ever, the four heroes unite by chance, but they are not the only ones. J'onn J'onz assumes the moniker of Martian Manhunter, inspired by Superman; Barry Allen, who has been acting as the Flash for nine years, joins the group to stop this terrible threat; and Shayera Hol, a woman with metallic wings, a club, and holes in her memory, known as Hawkgirl. Separately, the seven are great heroes, but together, they become legends. They become the Justice League. The beginning of the story of the greatest team of heroes the world has ever seen. After today, the world would never be the same.
