What if Pain using his sage technique to bring Itachi back to life> Itachi Burns the crap out of Kabotori (whatshisname)> appears in front of Saske (I'm Itachi bitch, stop your EMO)> Saske crying like a whiny like, self centered, self involved pussy> Saske and Naruto hold hands down the yellow brick road to defeat Madari.
Then Itachi burn the crap out of them both and conquers the world.
p.s. Only half of the nine tails chakra is sealed in Naruto. The yang part, this was stated by both the 4th and the preverted hermit. The other part was seal with the 4th.