Happy new year teammates Hi Beelow! Look forward to working with you.
The myth idea sounds interesting as long as we do not try too hard to represent both the myth character and the tarot character. In a chow I did a while back, I referenced "Peter Pan" when doing "Icarus" and that seemed to have confused a lot of people, even though I just tried to borrow the child-like, immature qualities of Peter Pan. I still think it's doable as long as we keep the original myth character strictly to the sideline and just borrow qualities from them, or use certain myth species whenever appropriate. We could also try going straight out and saying "Poseidon as King of Wands" or "Hades as Judgment" and make a myth-themed tarot, although I personally would prefer to stick more with tarot cards as abstract characters rather than reinventing myth figures.
I think an urban, hip flavor might be pretty fresh for tarots, even though that would be a great personal challenge to me since I have no idea how to dress hip. Straight-up fantasy works for me too - funny thing is I don't think I've done it since a long time ago.