Chapter 601 prediction
I'll admit, I wasn't sure how to fit the explanation of Rin's death into this, but aside from that, I think this is rather legit
601 - Their Agreement
*Naruto, Guy, and Kakashi stand shocked at Madara's sudden arrival. Obito's expression has barely changed at all*
Obito: So it's true, then. Kabuto did revive you.
*Madara looks at him with a slight sense of anger and disappointment*
Madara: Indeed, he did...not exactly according to our plan, was it? Would you mind telling me why Nagato failed to revive me before he did?
*The other three continue watching this ongoing conversation before Naruto expresses his thoughts out loud*
Naruto: What the hell are you guys talking about!? Why would Nagato revive Madara!? And what is he doing here, anyway!? I thought he was fighting Granny Tsunade and the other Kages!
*The two look over at Naruto and Madara recognizes him*
Madara: Hmm...you're that kid that was fighting alongside the Kages earlier...the Nine-Tails jinchuuriki. It seems you two have grown rather fond of each other.
*He turns to Obito*
Madara: It would appear that you have your hands full, Obito.
*Obito smirks a little*
Obito: Not in the slightest. Their discovery of the secret behind my technique was nothing more than a minor setback, as was Nagato's betrayal. It doesn't matter, though. There's nothing they can do now. Our plan has almost come to fruition at long last, Madara.
*Kakashi is still in his semi-conscious state as he continues to listen to them speak*
Kakashi (in thought): This doesn't make sense. Obito couldn't have survived that rock slide. And how does he know Madara? Did they...?
Kakashi: Madara Uchiha.
*The aforementioned looks over to him in curiosity, as does Obito*
Kakashi: How did you revive Obito?
*Madara can't help but let a smirk form on his face*
Madara: Whoever said I revived him?
Kakashi and Guy: !!
Naruto: What!? But, if that guy died like Kakashi-sensei said he did, then he would have had to have been brought back to life!
Madara: Insolent child, there's only one conclusion.
*He looks at Obito*
Madara: This man's life energy is even greater than my own. To my great surprise, he was still alive when I stumbled upon his body, though just barely.
*He thinks back to his first meeting with Obito*
Madara: I wasn't about to do what I did at first. He was still a member of the clan that betrayed me, after all. But, his willpower and strength intrigued me, so...I took him under my wing, nursed him back to health, and before long, I had a revelation.
*The three spectators look on in confusion*
Naruto: And what was that!?
Madara: ...I was a broken man. I'd been slowly perishing ever since I was almost killed by Hashirama. I knew I wouldn't be around forever to complete the plan I already had set in motion. Someone would have to carry it out after I was gone, so when the time came, I could be revived to finish what I started.
Kakashi, Guy, and Naruto: !!
*Madara looks at Obito for a moment*
Madara: And, despite a few mishaps along the way, you've managed to keep that end of our deal.
*He looks back at the other three, ready to jump into battle*
Madara: And now, there's nothing to stand in my way of completing the Moon's Eye Plan! Get ready, Obito. I'm going to show the beginning of a new world, void of war, of hatred,...and of pain!
~Just what did their agreement entail? With Madara having joined the battle, the fate of the world now rests on this final confrontation!!!~