They need sasuke to unseal the kyuubi? There has to be a reason why Madara is still alive, maybe an impure ressurection or a tensei. But maybe BECAUSE of that he can't use his sharingans full extent, Say a impure Eternal Mangekyo. And he either is trying to bring sasuke to the Akatsuki, or take his eyes and make his eternal sharingan pure again. Itachi still ACTUALLY cares about sasuke so he gave him Amaterasu. But why did he flee konoha is a question. And why treat him like a horrible enemy, even though it's leafs fault.