In the last chap, Madara stated he made Obito into the bad guy we all saw him as, he knew about him even before the boulder incident, he basically handpicked HIM to carry his Moon-Eye plan. He planned to make him evil; he implanted black zetsu inside him, the curse on the heart, the white zetsus along with the other black zetsu… All of this to get him to gather the bijuus, rivive the jubbi and finally Madara so that Madara would become the jubbi host…
WHY???
Why did he even need/want obito to do all of this? Why not nagato? The one he gave the rennigan to in the first place, why give someone power to revive you and not manipulate them but rather manipulate someone else to manipulate the guy you gave the power to? Think about it, if he had done to Nagato all the things he did to Obito, the story would have been exactly the same…
WHY???
Why did he even need/want obito to do all of this? Why not nagato? The one he gave the rennigan to in the first place, why give someone power to revive you and not manipulate them but rather manipulate someone else to manipulate the guy you gave the power to? Think about it, if he had done to Nagato all the things he did to Obito, the story would have been exactly the same…