"Historical Team – Unannounced Total War Title
Pre-production for our next historical major release continues apace, with the team working on pretty much all areas of the game at this stage, but particularly jaw-dropping are the character and campaign map concepts that are starting to crop up around the studio with increasing frequency.

It will still be some time before we are able to share anything specific about our next big historical game. The official social media channels, and the world’s press will certainly tell you when there’s more to reveal." from Sept 1st

Two things they can be doing: Empire 2 or Medieval 3. Shogun 2 is too new, Napoleon is too narrow in scope. They won't make China or ancient civilizations because IMO the market is too narrow - the general public has low knowledge of these areas and time periods compared to their percieved knowledge of classical antiquity and Europe during the Middle Ages.

Has anyone palyed the Charlemagne DLC for Attila? How close was that to the Medeival/Medieval II concept?