A Hokage fan works himself to death and wakes up as Shisui Uchiha.
He has only a few hours before Danzo takes his eyes.
In the original story, Shisui dies that night, and a few days later the entire Uchiha clan is wiped out.
This time, he doesn't hide or jump into a river. He goes straight to Danzo and kills him: Danzo wants his eyes, and he wants Danzo's life.
In a single night, Danzo dies, Root changes hands, and the Third Hokage is beaten into surrendering command. At sixteen, Shisui becomes the one calling the shots in Konoha.
Using the Mangekyo too much makes you go blind? Other people's eyes, Hashirama Cells, Tailed Beast Chakra: he can fuse them all into his own ocular power. He's read the original story, so he knows everyone's hidden trump cards.
The Uchiha clan survives. Itachi doesn't have to slaughter his family, and Sasuke gets to have a whole family. No saintly nonsense, no swallowing grievances: if there's a score to settle, settle it on the spot.
Orochimaru, the Akatsuki, the Five Kage, Madara, Kaguya... one by one.
Starting with Shisui, he sweeps through the shinobi world!
