There is still some room, so welcome aboard Rabelais!
I like the idea of enforced themes, but it would be difficult to check. I could check the starting sites on turn 1, and give the location of all the capitals, or the first turn could be sent to a third party for a quick check. "Hey, lucky you, you got Caelum in the random picks... Too bad I rolled heads, and you end up with the Raptors theme."
