This is the text. If you take it seriously, you will lose. Let's read it as a prequel... "Dead... All dead, everything is over..." Kyuubi looked at Uchiha Madara who was gradually leaving Susanoo, lowered his head slightly and closed his usually frightening blood-stained eyes and said thoughtfully, "Aku, do you think I summoned you just to let you kill people?" Uchiha Madara looked at Kyuubi with red eyes in disbelief and said. "Isn't it? You summoned me here just to clear the way for you!" Kyuubi sneered, "Because of all this, Izuna died. Do you want to drag the entire Uchiha family to bury you with you for your ridiculous peace?" "I'm tired, and I don't want to think about this anymore. Such a life..." Kyuubi changed his previous unruly attitude and whispered to Uchiha Madara. Uchiha Madara just opened his pair of Mangekyō Sharingan eyes and watched the last chakra of Kyuubi disappear between heaven and earth, but he couldn't even reach out to hold it back... "Ku Lama, don't go..." Uchiha Madara murmured, but no one could hear him.
The timeline begins when Madara Izanami of the parallel world is resurrected and uses the Sharingan to control the Nine-Tails to attack Konoha. The Nine-Tails accidentally breaks away from the illusion and triggers a space-time rift and comes to the HP world to meet the four giants of Hogwarts in the young future.