Kingdoms looks like it will offer much more then regular medieval for modding purposes. For instance you could add heroes like Hannibal, Phyrrhus or any other of the numerous historical generals. I believe kingdoms has support for dual cores as well (I know that AMD dual cores used only one core for me and a lot of other people with vanilla medieval.) so that could better represent battles. For all we know Kingdoms might increase the province and faction limit. (I know for a fact that CA said kingdoms will be more moddable then medieval 2. I think they said it's the most moddable total war game yet, though I'm not sure if that's true or not.) I have a good feeling that the culture limit is increased too. Medieval 2 had 6 like Rome I believe. (Northern European, southern European, Eastern European, Middle eastern, Byzantine and Mesoamerican.) In kingdoms judging by screenshots there's 7 or 8. (Northern, byzantine, Mesoamerican, Eastern European, Middle eastern, Apacean, likely southern European because of Spain being in the americas campaign and Teutonic. (not sure about Teutonic but that's 8 with it and 7 without. Not to mention there's could be another American culture and the Britannia campaign might include something like celtic. And the Lithuania or Norway could be unique as well.)