i know it seems stupid but greek gods !!
Zeus = Lightning
Poiseidon = Water
Hades = Fire and bad stuff
Aphrodite = Love
And image how sick their art would be !!!
I don't know if somebody had suggested this already.
Since we already have cops - Sentinel. Why don't we have a clan for their prisoners - Cryme? (convicted thieves, serial killers, corrupt politicians, etc) They could escape their cells, during the night, through a secret hole in their dining hall (possibly created by the Vortex to help them mess with the present Clint City.) Vengeance is their sole purpose of escaping. However they must return to their respective cells before the sun rises or else they may risk themselves from a harsh detention by the sents or worse thrown into maximum security. (in this case they became CR.)
If this happens, I bet cards from this clan will have interesting stories and bios. (see Hugo's bio)
Or random citizens that want to stop that war. Unfortunately, the rescues and the sentinels are already trying that
I really like the idea of a medieval clan, you would have ogres, dragons, knights, and the LD would have to be the king, just to make it perfect, his last level art would be him sitting on the throne, with his sword by his side...
I'm guessing the next one will be evil given the cycle of new release alignments.