The following characters can be unlocked by spending the indicated amount of Justice League of America shields that can be collected during game play.

Code - Effect

Batman (Batman Beyond infiltration suit) - 74 shields
Batman (classic blue) - 59 shields
Flash (Jay Garrick) - 21 shields
Flash (Walter West) - 48 shields
Green Lantern (bold) - 30 shields
Green Lantern (retro) - 23 shields
Martian Manhunter (modern) - 29 shields
Martian Manhunter (true) - 15 shields
Superman (black recovery suit) - 32 shields
Superman (Earth 2) - 65 shields
Superman (Kandor) - 91 shields
Wonder Woman (biker) - 61 shields
Wonder Woman (toga) - 44 shields
Zatanna (classic blue) - 25 shields
Zatanna (Identity Crisis) - 38 shields