It's basically a Lords of Creation style map (I really like the way you did that one), only it's locations will be card-game based.
Specific names we can work on later (like, the desert will be called The Shuffle, and whatnot), but the landscape itself I would give to you to determine. Also, when that's complete, I'd love to have input from anyone (whether they plan to participate or not) on different traditions of the Deckstack culture. Religions, sacred observances, political systems--strangely, I already have an idea for clothing styles, but some other staples of the different lands, I'd need help with.
In fact, I was also considering expanding the theme. Perhaps the world might be based on gambling and games of chance, or on games in general. Though, off the top of my head, can't think of any other specific lands. I may just stick with cards.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)