What if the Justice League members were all turned into a monster, what would they be?
With the exception of Batman and Green Arrow (although I do still have alternate versions of them) here is my list.
Superman - Vampire, one draws strength from the sun, the other id weakened by it.
Batman - Demon Hunter, normal humans with exceptional skills.
Wonder Woman - Werewolf, one is named after the moon, the other howls at it.
Green Lantern - Ghost (either that or someone who can control ghosts in the same way as the green light is used, or maybe even a magician)
Martian Manhunter - Space Invader (not much change as alienscan be seen as monsters)
Green Arrow - Dragon Slayer
Black Canary - Siren
Hawkman - Fallen Angel
Aquaman - Gill-Monster (aquatic creature)
Flash - Speed Demon?