It went something like this.
Tobi: Yo, I'm Madara, let's have a war!
Ninjas: You and what army?
Tobi: ZOMBIES!!!
(A couple years later(real time, not in-story time))
Tobi: I'm actually Obito from the Kakashi side story, the girl I loved is dead so I will hypnotize the whole world!
(Neji dies because there wasn't enough drama)
Real Madara: I no longer have a use for you Obito, I'll be the one to hypnotize the whole world!
(Real Madara succeeds aside from a few ninja and zombie ninja who broke from from his control)
(Real Madara is unstoppable)
(Black Zetsu betrays Real Madara, uses him as a sacrifice to revive Kaguya)
Kaguya: ...
Black Zetsu: She created chakra and is pretty much a god!
(Naruto and Sasuke are given the power to stop Kaguya from one of her sons)
(They fight across multiple dimensions, for some reason Kaguya has trouble killing them despite having access to a dimension of acid)
(Obito dies)
Naruto: Obito was a cool guy!
(The audience remembers the hundreds Obito killed, they all have horrid SAO flashbacks)
(Naruto and Sasuke win)
Sasuke: Before undoing the hypnotism, I will kill the Kages and the tailed beasts and become the dark side of justice. So I must kill you Naruto, because you are my friend.
Naruto: That's stupid, let's fight!
(Naruto wins)
(The last chapter ships EVERYONE)
(Except Tenten)
Of course they're together,
that was the plan all along.