Kakashi will obtain Obito's eye and Naruto will obtain Sasuke's EMS and become So6P
Here is my theory guys enjoy and no flaming.
Alright. As we know, Naruto, kakashi, bee and guy will defeat Obito, madara and the Juubi. How? because the show is called Naruto and if kishi kills the main character then this will have been the biggest waste of 15 years.
Alright, so IMO Kakashi will obtain obito's eye and unlock the final ability (the joining of 2 eyes gives the third ability, as stated by itach and madara as well as the databook). This will ultimately cause kakashi to become one of the greatest shinobi to have ever lived. Just imagine the power he has; being to make all attacks miss you and then sucking someone with your long range eye. And god only knows what the 3rd ability will be!!!This is just a thought, with no proof or anything, just think it would be cool :D
Here is where my theory comes:
Somehow, sasuke is going to come (either during or after the main war battle now) and fight naruto. If sasuke decides to become good, i think that'll ruin the story and he's killed too many people to be left off the hook. Since he is the main antagonist/protagonist, he will fight naruto in the end and will lose (because as stated above the show is called Naruto, not Sasuke). Why would Kishi make naruto and sasuke battle it out to the end on many occasions and state every now and then that there will be a final battle between them? Most likely because there will be. But here is where things get interesting. Why is it that Naruto in his bijuu mode looks to different than bee, who has stated he mastered taming the 8-tails? As stated by naruto wikia:
"Killer B is one of the few people to have achieved full control over a tailed beast as noted by Danzō Shimura, achieving this control with ease at the Falls of Truth, greatly surprising the spectators. Like his fellow Kumo-nin, Yugito Nii, B is able to transform into his tailed beast with great ease, reaching a full transformation in mere seconds and is able to maintain control even in this fully released state. B is the only known jinchūriki who can at will, transform and remain in his of his full tailed-beast form indefinitely."
But then why, does he not look like this?: http://www.narutobase.net/manga/Naruto/571/5
It is clear that Naruto has a different looking beast mode than any other jinchuuriki. This is an obvious resemblance to the So6P. However, what's more interesting, is what happened when he sealed the nine tails:http://www.narutobase.net/manga/Naruto/499/14
Why is it that naruto sealing Kurama caused him to go into this special form? Kurama himself said that this power is that of the So6P's. Another interesting point that joins everything together is the fact that the only known people that have been used for Kurama's jinchuuriki host has been uzumakis! Why is this important? Because this adds to what everyone is saying now, that the So6P is possibly an uzumaki! Why is it that everyone who had some control over their beast, looks nothing like naruto does? IMO, if Kushina or Mito had tried to befriend Kurama and gain control over him, then they would look exactly like naruto does.
So, now why is this all important? because we know that the So6P had the rinnegan.
IMO, why would kishi have Itachi die and have sasuke gain EMS all for him to die by the end? Similarly, it just so happens that the Uzumaki clan has been proven to be a derivative of the Senju clan. Naruto has everything he needs to become the So6P at this point! By transplanting Sasuke's eyes, he will gain the rinnengan and become the New So6P.
Why would Kishi make naruto look like the way he does, so similar to the So6P when he goes into bijuu mode? Why would sasuke gain EMS and be the main antagonist towards Naruto? sounds similar to Hashirama and Madara right? Their rivalry would have been perfect for Hashirama to obtain the rinnegan, but he did not have the knowledge like Madara did. Madara was able to read part of the tablet of secrets which gave him the knowledge on awakening the Rinnengan. But back then, no one knew the rinnegan existed. On the contrary, at this point, everyone knows now that senju DNA and sharingan are needed to activate it!
Therefore, my theory is: Naruto will kill sasuke and transplant his eyes, becoming the new So6P and bring peace, just as the former sage did.
What are your thoughts guys? Thanks if you read this long! If you have anything to say and is good, ill rep you