Another plot idea could be that Naruto, now the new Hokage, wants to revolutionize the ninja education system in Konoha. He faces a lot of opposition from the traditionalists. But he perseveres and tries to incorporate new training methods and teachings that focus more on cooperation and understanding between different ninja clans.
One idea could be that Naruto, as the new Hokage, has to deal with a new and powerful enemy from a long - forgotten clan. This clan has a unique jutsu that can disrupt the chakra flow in the village. Naruto has to find a way to counter it while also maintaining peace within the village.
One idea could be Naruto facing a new and powerful enemy that challenges the very foundation of the Hidden Leaf while he's Hokage. He has to use his unique leadership style and ninja skills to protect the village. Another could be Naruto implementing new training programs for the younger ninjas, based on his own experiences growing up.
One idea could be a story where Naruto has to face a new, powerful and mysterious enemy that has the ability to manipulate time. This would put his skills as a Hokage to the ultimate test.
One idea could be Naruto facing a new and mysterious threat from a hidden clan that has long been dormant. They could be trying to undermine the peace he has worked so hard to achieve as the Seventh Hokage.
One idea could be exploring the Shodai Hokage's early days as a ninja, before the founding of the village. Maybe show his training and how he developed his unique skills.
One idea could be Naruto having to deal with a new and powerful enemy while still adjusting to his role as the 5th Hokage. Maybe this enemy has a unique jutsu that can disrupt the village's chakra network. Another idea is Naruto using his new position to reform the shinobi education system in the village. He could introduce new training methods that focus on teamwork and moral values as well as combat skills.
One idea could be Naruto as Hokage facing a new threat that only Hinata's unique skills can help with. For example, a mysterious enemy that can nullify normal ninjutsu, but Hinata's Byakugan - based techniques are effective. Another plot could be a time - travel fanfic where Naruto and Hinata go back in time and have to prevent a disaster that would change the future of the Hidden Leaf Village. They could also explore their relationship in a different era.
One idea could be that Sakura becomes Hokage first. Naruto goes on a long-term mission and during his absence, Sakura steps up and proves herself as a great leader. She implements new medical ninja programs in the village. When Naruto returns, he is proud of her and they work together to make the village even better.
One idea could be Naruto and Sasuke teaming up to face a new, powerful and ancient threat that even the combined might of the Hidden Villages can't handle easily. They have to use their unique skills and the bond they've reforged as Hokage and his equal.
One idea could be exploring the Nidaime Hokage's relationships before he became Hokage. Maybe his friendships with other ninja that influenced his leadership style.
One idea could be Naruto and Hinata going on a secret mission together as Hokage and his wife. They face an unknown enemy that tests their relationship and combat skills. Another could be a story set in an alternate universe where Naruto isn't the Hokage and he and Hinata have a simple, peaceful life in the village, but then a threat emerges that forces Naruto to step up in a different way.