Ok. Shogun 2 is based around the Sengoku Jidai, a period of time where the samurai clans battled for control of the country. Wouldn't it be cool if we had a mod where, instead of Japanese clans killing each other, we had Scottish clans killing each other? Same basic unit types (swordsmen, pikemen, archers), same kind of geographic location (isolated, small), and a same basic goal; the Kingship of the Scots. We could even have invasions from off the map from the Vikings and the English, although we would need a god-like coder.