I know the game is not out yet so it's a bit early to talk about DLCs, but I am very hyped for the game! However I missed the details from the first months of announcements and I am not sure if something has been said already regarding DLC plans. 

I know that some cultures have been mentioned as going to be included in future DLCs (Incas if I remember right for example?), but I am not sure if something else have been said, like if there will be DLCs that add only new cultures and then others that add more mechanics for the game or something. To sum up, I am wondering if the only thing that we know about the DLCs right now is that they will include some new cultures, or if something else was said about them. Thanks!