I don't know if this was said but its obvious from one of the panels that Sasuke's goal is to wipe out all jinchuuriki's. He said that he will eliminate this system and replace it with a new one. He wanted them Beast to burn down to the grown and take all the jinchuuriki's with it. If he achieves this goal it will only leave Naruto and B, which will ultimately lead to an intense battle. I don't know what his long term plan is but it is clear what he is thinking. Deep.