Actually from the new game informer article it says that the nine have a close connection to the ahamkara and what I believe is that the nine are the last ahamkara being that there is only nine of them left and Xur was created by them to send messages and findings to the reef and tower in exchange for strange coins which the nine need I would think we will learn of whom the nine are and what the ahamkara actually look like in destiny 2