Well, one plot could be Naruto trying to find a balance between his family life and his duties as Hokage. He has Hinata and his kids, and he wants to be there for them but also has to take care of the village. There could also be a plot where Naruto discovers some long - forgotten secrets about the Hokage position that give him new powers or responsibilities. He has to figure out how to use these new things for the good of Konoha while also keeping them a secret from potential enemies.
A plotline could be Naruto having to deal with the remnants of old enemies. Some of Orochimaru's followers might still be causing trouble, and as Hokage, Naruto has to stop them without using excessive force. He wants to show mercy but also protect the village. Another aspect could be Naruto working on the village's infrastructure. He realizes that a strong village isn't just about having powerful shinobi but also about having a stable and prosperous community. So he starts projects like building new schools for ninja training and improving housing for the villagers.
Another idea for this fanfiction is that Naruto's time travel as the 6th Hokage could lead to him meeting his predecessors in a different way. He could learn new jutsu or leadership skills directly from them. For instance, he could have in - depth conversations with the 1st Hokage, Hashirama, about how to better manage the relationships between different ninja clans and build a stronger, more united village.
One possible plotline could be Naruto using his newfound time - traveling ability to prevent some of the major tragedies in the past. For example, he might try to stop the Uchiha massacre. He could also use his knowledge from the future to help his younger self become stronger faster, perhaps by teaching him some advanced jutsu he learned later in life.
One possible plotline could be Naruto as the 6th Hokage facing a new threat to the village. Hinata, being his wife, supports him from behind the scenes. She might use her Byakugan to gather intelligence. Naruto, with his leadership skills and Hinata's support, unites the village to combat the enemy.
The story could be filled with Naruto proving himself. He'd likely face opposition from some in the village who still doubt him due to his past as a jinchuriki. Naruto would use his unique ninja way and strong will to overcome these doubts. He might start new training programs for the younger ninjas, focusing on teamwork and believing in oneself. His first big decision could be about how to handle the village's relations with other hidden villages, using his own experiences of making friends with enemies to promote peace.
There could be a storyline where Naruto, as a fan of the 4th Hokage, gets to time - travel back to the era of the 4th Hokage. There, he could interact with his father, learn from him directly, and even help him in some of his battles. Or maybe Naruto tries to prove himself worthy of being the 4th Hokage's successor in a more intense and unique way compared to the original story.
Another plotline could involve Naruto being chosen by some ancient and powerful force to become a god. As a god, he has to deal with other divine beings. He may face challenges like jealousy from other gods or having to prove himself worthy in the divine realm while still caring about his friends and the village he left behind.
One possible plot twist could be that Naruto has to face unexpected opposition from within the village. Some of the elders might not be fully on board with him becoming the 5th Hokage because of his unorthodox ways. They could try to set up various challenges and tests for him to prove his worthiness. Another twist could be that an old enemy resurfaces, specifically targeting Naruto because of his new position as Hokage. This enemy might have some vendetta against the village leadership and sees Naruto as an easy target to strike at the heart of Konoha.
One possible plotline could be Naruto being exposed to some sort of dark jutsu that warps his mind and makes him idolize Tobi. He might start to adopt Tobi's methods and goals, causing chaos in the ninja world. His friends would be shocked and try to bring him back to his senses.
One possible plotline could be that Naruto is cursed by a powerful dark jutsu during a battle. This jutsu slowly transforms him into a demon. As he changes, his friends initially try to find a way to reverse it. But Naruto starts to gain new powers that he must learn to control, and he has to struggle between his human side and the emerging demon nature.
One possible plotline could be that Naruto is exposed to a dark and powerful jutsu that gradually transforms him into a monster. He might start to lose his sense of self and his friends have to find a way to reverse the process. For example, Sasuke could use his Sharingan to try and understand the nature of the transformation and look for a weakness in the dark jutsu.