After meeting Nagato-or rather, seeing his own Rinnegan-Madara lost interest in this future. Besides, they had interfered with the future too much, and their Dragon Vein chakra had already become unstable.
They immediately used the Body Flicker Technique to reach Rōran, but there, they encountered shinobi from the Five Great Nations. Apparently, after Uchiha Mu and Madara finished collecting the tailed beast chakra, the Five Great Nations had convened a summit.
Knowing the two might return, they had stationed several shinobi here. Naturally, those shinobi could not stop Madara Uchiha. Collecting tailed beast chakra had been child's play for him. According to the Jinchūriki afterward, their chakra had been stripped away as soon as they fell under his genjutsu.
With someone like that, and with both the Raikage and a Perfect Jinchuriki having been controlled by genjutsu together, no one wanted to attack the pair anymore. The Tsuchikage had even come in person. This was no longer a matter of staying behind the scenes. No amount of caution was excessive when dealing with Madara Uchiha.
"What was your purpose in coming to the future? Simply collecting tailed beast chakra?" Kakashi asked first, as the only shinobi present with any connection to traveling through time.
"Yes, though we also wanted to explore the future. Unfortunately, the Great Ninja War hasn't started yet." Uchiha Mu shook his head.
"What do you mean?" the leading shinobi from the other Shinobi Villages asked together.
"Exactly what I said. There will be a Fourth Shinobi World War." As soon as Uchiha Mu revealed that, their bodies began to destabilize.
"Looks like we're reaching our limit," Madara said.
"Everyone, perhaps we'll meet again in the future." Uchiha Mu waved, then took Madara into the Dragon Vein using Flying Thunder God. After a tremor ran through the