While I did put in for Shogun:2 which would be dream come true for me. If CA plans on furthering the time line, they still have technically a lot of unused space.

Personally, if CA re-uses it's engine at least twice per game, then naturally the next phase in Gun-Powdered Warfare would be something like Victoria: Total War. A timeline that still uses much the same tactics as the previous, but would run somewhere between 1830-1914. Really, this was a very interesting time period, and chock full of Conflict, between both Empires, Colonial Struggles, Emerging nations trying to find their way, and so forth. Plus, you get the benefit of pretty dramatic battles, just in sheer terms of the manpower used, and emerging technologies like rifles and much longer ranged cannons, etc. I mean, the tactics used by armies during this period were complete madness, and 50,000 men could easily be butchered in a day of conflict if you weren't a very good commander.

You also a lot of social upheavel, and unrest, so being able to manage an Empire, and having to deal with Anarchists, Communists, Social Liberals, market liberals, Social Conservatives, Market Conservatives, Nationalists, and the lot would probably keep you and your enemies fairly occupied, so it would take a real effort to go-a-conquerin'. Especially if you were to play a faction like Austro-Hungary or Russia.

The Sea Combat system wouldn't necessarily go to waste either, because you have enough timeline to see Ships of the Line being replaced by Iron-Clads, which in turn near the end of the scenario get replaced by Deep Draught Juggernauts and Destroyers. Which I think would be so much more fun, than seeing two wooden Junks on the Sea of Japan shout insults at each other, and each go their own way.

Anyway, just an opinion.