Switching gears and doing some ye olde badde guys to counter ye olde JLA.
The Jester: The Joker as a court jester. The crossbow pistol has a little flag that says "twang" and his scepter's head is heavy and mace-like.
Bizarrus: Bizarro as a bit more of a mishapen dullard. I gave him a Holdyn Twyst styled bigguns cap because I felt like it.
The Riddlesmith: The Riddler gets a more important role in a sword/sorcery world, where riddles are a vital part of quests. I wanted him to feel like the odd man the hero meets on the street who presents him a challenge or engages in a battle of whits. I bent him into a physical question mark shape and he's holding an egg: the ultimate riddle object.
Lord Luthor: Lex has been president and business tycoon, so I see him rising to power in this particular age through war, assassination and intrigue to become a powerful ruler, and a largely effective one for the time. The difficulty would be that he'd actually create a thriving and sucessful kingdom and might even be largely respected by his subjects, so when he sees the powerful threats to his kingdom enter and feels they mock his success by their mere existance, he might be cheered on in his battles against them. Could be interesting to play.