Didn't cryptic comet do something similar with Armageddon's empire and solium infernum?
Also - cryptic comet deserves a mention - last I checked it was a one man show, (may have added 1 more person)and he had launched 2 lovingly created card based strategy games.
The first was pretty good fun to play (post-apoc earth empire building with card games! quite fun), and the second was very ambitious (you played as a prince of hell, and an entire meta game of subterfuge underlied your attempt to take-over hell.)
Whats cool about it is that I can easily see him with a little help getting his games on the mobile markets and crushing a lot of the competition. Worth a look - His blog on how he designs his games is here - http://www.crypticcomet.com/blog/ Website - http://www.crypticcomet.com/