"Wow your future selves are awesome!" Naruto, Sasuke, Sakura and Kakashi are targeted by an evil shinobi who sends them back in time. He thought there was nobody to help them there and could be able to eliminate them. Boy were they wrong!
There are many earths within the multiverse's. Most thought Earth X was the most brutal Earth, but they were wrong. There was one Earth, where the Trinity ruled with an ironfist, and kept everyone at bay with fear alone. This is how they came to rule. Welcome, to Negative Earth!