I have the craziest idea.
It really would be a great map - everyone would be into the theme and the gameplay - which would have lots of features and be unique (the gameplay would fit the theme too). Everyone has heard of, and probably knows a little of the folklore of the theme and it hasn't got a copyright. But nobody has used it yet.
To do justice the idea, great graphics, with a few illustrations / icons (cartoon-style maybe) would be needed.
This would take cartography skills which it would take me too long to learn.
Why am I not explaining my idea?
Because it is too good to let anyone just nick.
So, get in touch cartographers and if I trust you I'll share the project with you.
Seriously, you'll spot its massive potential. It would be a map everyone would put top of their list to try and many would want to become strategy experts, it could rival Feudal War and the AoRs for gameplay popularity.
Seriously, get in touch, you wont regret it!