Fooey... I voted anything as long as no gunpowder.

Three of these choices (Rome2, Shogun2, Napoleonic) are NOT going to happen as an expansion. Those are full games. So the poll is a bit silly (IMO). And it leaves out what I think is the most logical expansion pack: Pirates of the Caribbean!

Seriously... if you have a foothold in the Americas, then why not an expansion pack that extends the game into the next colonial period in that area? It's ideal because you'd still need to hold your territories in Europe, as well as compete economically and militarily in the Americas. Of course the ship combat would suck, unless they really start working on a tactical sea combat engine.