My prediction for chapter 509.
Chapter 509: Past and Present
Kabuto walks along a path part of Akatsuki's hideout, and enters a room that has never been seen before.
Kabuto: With "Madara" busy, I'll finally get a chance to get that which I came for. Just a little more now, and things will swing into motion.
On the island, Naruto and the rest ponder about the shark's escape (that held critical information), and realize they can do nothing more to stop it. Their next course of action will be to return to mainland and notify the Kages that Naruto and Killer Bee should be allowed to a part of the ninja alliance's forces.
Before they can do this, a figure stops them dead in their tracks, and it is Zetsu.
Black Zetsu: I cannot let you go any further.
Yamato: They just keep coming!
Even though he injured his ankle, Naruto attacks Zetsu head on, but is easily repelled.
Black Zetsu: Madara might have told me I'm the non-warrior type, but you have yet to see my abilities.
Motoi (in thought): He's trying to delay us from leaving the island. But why?
Killer Bee: You're about to experience fear, so why have you come here?
White Zetsu: Let's have some fun.
Naruto steps forward, calm and collected, preparing to battle Zetsu.
Naruto: I don't know if that leader of yours sent you here, but know that he should not be expecting you back. You will die here.
Black Zetsu (laughing): Pain was right. All you do is talk. For someone who believes so strongly in the "Will of Fire" and its importance, you're rather manipulative, aren't you? You've swayed an impressive amount of people with elegant speech; but I think you should know words have no effect here on out.
Naruto says nothing, controlling his emotions.
Black Zetsu: What's wrong? You usually lash out when you're frustrated.
Yamato: He's just trying to anger you.
Naruto: I'm not frustrated.
Black Zetsu: Let's see. Think of this as training for both of us, for the time you fight with the one friend, who you've bonded with the most, who's turned his back on you and humiliated you. But that's enough talk; let's begin.
Back in Amegakure, Konan and Madara prepare to face off.
Madara: It seems the Amegakure orphans will finally be together again after this.
Konan: You manipulated us all into doing your bidding, and I must kill you now.
Madara: After I finish you off, I'll find the Rinnegan, and at that point no one of you will be able to stop me.
Konan divides her body into numerous pieces of paper, proceeds to expand, towering over Madara, then disappearing within that same instant.
Madara (in thought): There's nothing she can do here. She doesn't have the ability to completely erase traces of her chakra, and just the slighest amount will give my Sharingan the chance to find her, and kill her.
A current of lightning strikes Madara directly where he stands, but he makes no effort to avoid it.
Konan (in thought): Just as I expected. His ability includes hardening his body to that of steel, and softening it to a feather; it seems to be slightly faster than that phasing ability of his, so I'll have to find an opening. It'll be difficult, but his technique is more predictable than he thinks.
As Konan rises from the water behind Madara, he quickly turns around to kill her, but as he stabs her, Konan's body dissipates into paper.
Madara (in thought): A paper clone?!
From above, another current of lightning roars straight down the center of his body, before he can make himself intangible. The impact kills him instantly.
Konan reassembles her body and stares down at the shattered body before her. But the victory was only transitory. Behind her a figure looms, and it is Madara again - Konan barely manages to escape Madara's chains, but not without injury.
Konan (in thought): It can't be! He should be dead!
Konan looks at the body that was struck by lightning, and makes the observation it is exactly the same like the one standing before her.
Suddenly Konan touches upon a massive realization, and she does not take a moment to think it over, for she now knows the one thing that's been keeping everyone else from being able to fully kill Madara.
Konan (in thought): That has to be it! There can't be another explanation. If I use his own secret against him, I just might be able to pull this off.
In the village of Amegakure, a figure in a black, hooded robe silently walks by, not even looking up for one moment at the sprawling place around him.
Unknown: Almost there.
END
And this is my prediction. Thank you and enjoy!