A new expansion pack for Medieval II: Total War called Kingdoms was recently unveiled by Sega. The guys from CVG had an interview with Brendon Rogers, a designer and artist on the project.
Here's a snip:
Kingdoms' four new campaigns are set in the Americas, Great Britain, Northern Europe and the Holy Land - what made those locations ideal for the expansion?
Brendan Rogers: For Britannia, Teutonic and Americas a major factor was the public demand as we are constantly bombarded with requests to make games covering the history of these particular lands in greater detail. The Crusades is the fourth campaign and it is included because it offers such an interesting game world.
During medieval times the Crusade in the Middle East was the place of hero's, professional soldiers, religious zealots, holy relics, wealth, and intense politics. It also gives us an opportunity to explore an end game that escalates to a climatic finish.