I am sure just like the two last TW, it will be realesed unfinished, then instead of repairing bug or the stupid IA they have for already 2 TW, they will realease DLC. I think it's a bad idea for them to create a new game so close to the previous in time and in space, for sure a medieval one would have been better.
Apart form that, the family thing upgraded seems really cool, it was the thing I enjoyed the most in shogun. It allows more to put yourself in the place of your general.