Green Arrow Arrow
1 of the first 5,000 to vote in a Injustice Battle Arena Match
Green Lantern Regime
Unlocked through Hall of Justice Archives: 1 Armory Key
Green Lantern Yellow Lantern
Green Lantern New 52
Complete a Bonus Battle in the Injustice: Gods Among Us iOS app and use a WBID account to link it to your game.
Harley Quinn Arkham City
Purchase a Joker character card in the Injustice: Gods Among Us iOS app and use a WBID account to link it to your game.
Harley Quinn Insurgency
Unlocked through Hall of Justice Archives: 1 Armory Key.
Hawkgirl Regime
Unlocked through Hall of Justice Archives: 1 Armory Key.
Joker Insurgency
Unlocked through Hall of Justice Archives: 1 Armory Key
Joker Arkham City
Unlocked with a Wal-Mart pre-order.
Killer Frost Regime
Unlocked through Hall of Justice Archives: 1 Armory Key.