8. Animal-Vegetable-Mineral-Man
Who? A Swedish scientist that can change any part of his body into the form of any animal, vegetable, or mineral. Mostly he looks like a diamond-encrusted T-rex with tree-branch limbs, though.
Why We Won't See Him... Okay, Im kinda cheating with this one. Animal-Vegetable-Mineral Man isnt specifically a Justice League villain, but hes had encounters with just about every other superteam in the DC universe, and even individual leaguers like Batman. One look at this guy and I think youll understand why he needs to be included on every comic book list ever. As for why he shouldnt be in the Justice League movie? Well, look at this guy. WTF LOLOLOLOLOLOLOLOLOLOLOLOLOLOLOL!... Ive devoted my life to this. Kill me.