Right, this has been difficult,
have found it really hard to try and decide on my four suits and which creatures to use for the Ace, King, Queen and Jack.
At the moment am thinking of using
firebird - phoenix or similar (this represents fire, would be male, maybe the king card???)
Yuki-onna or Gamayun (Japan/Russia) (air, both take on female forms so could be either Queen cards or the ace card.)
Jengu - from Africa, a mermaid like creature, could be used as basis for a Queen card.
Chupacabra - from native American folklore, meant to be a creature which sucks the blood of goats be reptile like in appareance. This could represent earth, the connection is a bit loose though......