Justice Guild of America

[1] At the climax of a fight between the Justice League and a giant robot remote-controlled by Lex Luthor, it falls over, threatening to crush Flash, Green Lantern, Hawkgirl, and J'onn J'onzz.

There, they meet the Justice Guild of America members Tom Turbine, The Streak, the Green Guardsman, Black Siren, Catman, and their sidekick/mascot Ray Thompson.

After the Streak sees Flash save Ray from pieces of a falling building, he realizes the League aren't criminals and stops the fight.

They help the JGA fight a group of their enemies called the Injustice Guild of America, who are based on Golden Age DC supervillains, consisting of Music Master, Sportsman, Sir Swami, and Doctor Blizzard.

Doctor Blizzard wins when he takes Flash and Black Siren as hostages, and leads the IGA in robbing the Seaboard City Mint and escaping by blimp.

Meanwhile, Hawkgirl discovers graves of the JGA, prompting her and Lantern to probe deeper into inconsistencies found in the "perfect" Seaboard City, such as how some, if not all dangers in it happen to come from out of nowhere.