I don't think the Akastuki's plan is very complex at all. This group consist of 9badass ninjas who prob want NWO and are gathering the existing Yomas to make it easier on themselves. If Orochimaru can take over a small country by himself then imagine what these guys could do. Sooner or later their gonna put a hit out on Orochimaru because he poses a threat and will prob start the next big world war between villages since their movements will soon spread throughtout most of the ninja villages in the Naruto world.