Kage Bushin feint + Rasengan combo
Power of friendship
Talk no Jutsu
Alliance shuriken attack
Sasuke will solo that puppy
Orochimaru will take it over and be the next Rikudou Sennin
Tenten will absorb it and become complete once again
Obito will screw Madara over and sacrifice himself for the greater good
The Gaikage will destroy it with the Eight Gate
We can call him Gaikage: The Juubi Whisperer.
It seems like Obito will come to his senses and help screw up Madara's plan.
"We are still enemies, Kakashi!"
Damn, am I drunk right now.
Another highly unlikely possibility: Chouji opens the 8th Gate, goes Ultimate Baika No Jutsu and pokes Juubi to death... somewhat like this:
juubi copies naruto's "talk no jutsu" with rinnengan and "talks" madara and obito into becoming good guys
My money is on Juubi getting Kamui'd into the pocket dimension by Kakashi, Obito or both.
This fight is more about them than Naruto (Naruto only serves as a physical reminder to Obito of the kind of person he used to be), I'm pretty sure we're gonna get a flashback that explains why Kakashi killed Rin, Obito will find redemption/realize that the genjutsu isn't the answer and either he or Kakashi, or both, will port Juubi away, clearing the stage for Naruto (& Sasuke) VS Madara.
a more realistic one... obito will kill sakura saying something like:" u see naruto u failed too, blablablabla do u understand me now?" naruto collapsing again just to get help from sasuke who says something like "whats wrong scaredy cat?" a little bitchtalk about how obito killed sakura and then just for a ashort time team kakashi will be reunited "for the last time"
after seeing a killed obito, madara finally takes action and goes to rampage, but somehow orochimaru cancels the edotensei done with his chakra and madara says goodbye
now only a free and wild roaming jyuubi remains which gets pwned with the strength of all the other survivors, last action would be naruto with a moonlikerasengan where all his and kyuubichakra is gathered , unfortunality he dies too because he is afucking moron like everytime and has to hit it in taijutsu
then we got the choice between kakashi gainign rinnegan, or sasuke just to use rinne tensei to neglect the deaths
Silver Surfer is going to find the planet and call Galactus to eat it. Then Galactus is going to end up eating the Juubi, Naruto, Madara, Kakashi and so on. Great meal he yells!