[A little political intrigue + Cunning + Decisive and ruthless + Rebirth]
At the Battle of the Valley of the End, Sasuke Uchiha gathered the power of all nine Tailed Beasts and still only managed to draw with Naruto Uzumaki. Only then did Sasuke see the difference between ninjutsu and senjutsu.
He used the full power of his Rinnegan to transmigrate back to the past.
In this life, Sasuke would save the Uchiha from being wiped out.
Then
Claim senjutsu.
Gather the Tailed Beasts.
Establish the Ten Akatsuki.
Destroy Black Zetsu.
Abolish the daimyo.
Unify the shinobi world!
“Naruto, only unification can bring peace to the shinobi world.”
“Sasuke, that’s wrong. We should be friendly. We can all live together in harmony and use love to change people.”
“Naruto, cut out the stupid talk-no-jutsu. You don’t even understand Nagato.”
…
“Shikamaru, come serve as my aide. I want to start a civil service government for the shinobi world, beginning with you.”
…
“Gaara, submit to me. I am willing to make you a feudal lord.”
…
“Orochimaru, why not serve as my aide? In the future, I can let you experiment on every condemned criminal in the entire shinobi world.”