Netmarble Mobile's DC Comics adaptation is an action game with RPG elements, in development for iPhone, iPad and iPod Touch devices.
Batman, Superman, Wonder Woman, The Flash and Green Lantern have been confirmed as playable characters, but it is unknown whether this is the complete roster.
Players can unlock new costumes and features for each hero and boost their skills and stats thanks to the inclusion of 'Support Hero Cards'.
Batman: Arkham City developer Rocksteady Studios is working on a Justice League title for home formats, believed to be a prequel to its successful Batman releases.
Warner Bros has also confirmed plans for a blockbuster movie based on DC's flagship title. The project is expected to arrive in cinemas by 2015.
Justice League: Earth's Final Defense is expected to be released on the App Store this month.