My apologies if this version or something similar has been posted, I havent been here in a while XD
My version of the end arc of Naruto (sorry if it sucks D
*As a descendent of the younger son of the Sage of the Six Paths from both his mother and father side (Uzumaki and Senju), during Naurto's fight with Tobi, Naruto's "Nine Tail Chakra Mode" will react to Tobi's Rinnengan(Since The Sage was at one point Jinchūriki of the Ten Tails and Naruto's own form resembles the Sage) and force Naruto to gain Rinnegan Eyes as a Kekki Genki and turn the tide on on the fight with Tobi, forcing him to retreat.
*Sasuke will enter the fight with the Kages and seeing Madara in the fight, will defeat the Kages with Madara. Madara will reveal to Sasuke how to gain Rinnegan but will not show him how to use it as Itachi will manage to stop Kabuto Resurrection Jutsu and Free Yamato, and kill Kabuto. As a result Itachi, Madara and anyone left resurrected will disappear.
*Sasuke will continue on this War path to Konoha, Tobi will attempt to join Forces with Sasuke but Sasuke will kill him swiftly. Scouting will reveal that Sasuke will take 3 days to react Konoha and the remaining forces of the Shinobi alliance will make a final stand at Konoha.
(This part is the sappy bit)
*Naruto will ask Sakura out on a date on the Second day at night. Going to the ramen bar, basically she will see the best and worst of Naruto on this date(I KNOW its highly stupid and unlikely but its the only way I can see this story bit wrapped up because Sakura is a twat who in in love with a guy who will kill her if he gets the chance) and reaffirming his promise to her to bring Sasuke back with the Nice guy pose and he leaves her at her front door.
*On the Third day, the Forces are ready to go. Naruto, having possession of the Rinnegan will set up a barrier, sealing Konoha and everyone in it. Stating that no one in Konoha is strong enough to keep up with Sasuke except for himself and that the barrier will drop in only one of two ways: He releases it himself or his death will release it. Naruto, with his back turn to Saukra, will apologize to her. Turns to her and says,"Cya, Saukra-Chan" in the gay, Nice guy pose one more time, and the clone will disappear. Turns out, Naurto already left to hold off Sasuke at the Valley of the End, after Naruto and Sakura's Date and left a clone to place the barrier up and prevent anyone from interfering.
*Naruto and Sasuke fight will mirror the fight between the younger and older sons of the Sage of the Six Paths. Ultimately in the end, Naurto will make a move that will defeat Sasuke at the cost of his own life and leave him incapacitated. Naruto, with an uncharacteristic move of thinking ahead of time, left a single clone outside of the fight to watch.
*Dying, and incapacitated. Naruto tells the clone to take Sasuke back to the village that he will attempt to remain alive long enough of him to get there. Naruto with Sasuke on his shoulder, have a talk on the way over to the village, work stuff out the way Naruto can change a person's view etc., tell him about itachi, his own mom and dad and various other events that happened while he was gone.
*As Naruto and Sasuke reach the Barrier, everyone is elated. Kakashi, being the only one who notices that Naruto has no wounds, realizes he is a clone and mutters to himself,"oh no...." Naruto releases the barrier, Sakura comes running up to him and Sasuke and starts tending to Sasuke wounds, crying saying "Thank you Naruto, I knew you can do it" As everyone starts heading towards them, happy. Sasuke looks at Sakura and utters quietly,"fool, you haven't notice have you..." she says, "What?" Sakura looks up and notices Naruto has no wounds, she looks to Kakashi and see that he is depressed as shit. And when she looks back at Naruto, he has that smiling face he is known for and the clone disappears. Kakashi, and everyone of the Konoha chuninn and Jounin head the the valley of the end. Sakura crying stays behind with Sasuke. She then leaves to find Naurto
*Naruto, lying on the floor similar to his defeat the first time around, smiles and passes away. As Kakashi and the rest of Konoha
arrive, they realize its too late. Sakura arrives, crying as she see him dead on the floor, she calls him a Baka and to get up, that she wants to go get ramen with him again, that it was nice. But nothing.
*Jumps Ten Years, A new class of genin enter the academy, Kakashi is acting Hokage and address the new students, In the Background you see the monument to the Hokages, with Naruto face as its newest addition. Sakura begin teaching a new class and a single student pops up does his version of the Sexy jutsu, everyone starts laughing, she throws an eraser, screams and calls him an idiot and asks whats his name, Nagisaki Kai, and proclaims himself the future greatest Hokage ever.
Well, thats the best I got considering I am trying to predict an ending to a series.... thoughts? hate? Expand on it?