The Super Powers Team Galactic Guardians (1985)

A new villain called Ace recruits four young thieves and turns them into Super Villains called the Royal Flush Gang. With their new powers, they are able to capture Superman, Wonder Woman, and Firestorm. Ace is in cohoots with Darkseid, and things really get wild when Batman, Robin, and Cyborg raid their hideout. Batman also discovers that Ace is really his arch foe, the Joker, a rather unlikely foe to team up with Darkseid.