hm I think there has to be a mastermind behind the akatsuki. Why else would they want to get their hands on the kyuubi? I mean i can't imagine that they would want to release the kyuubi out into the world again. How would they benifit them? If they want to destroy the world they could do that themselves. Also there has to be a reason why itachi killed all his clan members. Someone must have influenced him.

Oh and i don't think Oro wants to use Sasuke's body to destroy Itachi. I think he just wants to destroy Konoha. I dunno could be wrong.