I hope not. I've enjoyed almost all the total war games and there add-ons so far. I hope they add Napoleon to the Grand campaign in a expansion and extend it into the 1800s.

As for the next game I doubt I'd buy RTW2 as I didn't like RTW as much as the other games and right now I can sill play it I want to so wouldn't be interested in buying a remake. something set in china or the east would be fun I think as I know little about the history of that part of the world.