One idea could be Naruto seeing a future where the Hidden Leaf Village is in ruins due to a new, powerful enemy. He then spends his present time training harder and forging new alliances to prevent this future. Another plot could involve him seeing his friends in danger in the future, so he starts to teach them new jutsus in the present to better protect themselves.
A really cool plot could be Naruto seeing a future where all the five great nations are united under one banner, but there are dark forces trying to break that unity. In the present, he starts a diplomatic mission to strengthen the bonds between the nations even further. He could also see a future where he loses his connection to the Nine - Tails, which makes him value it more in the present and work on strengthening their bond.
Well, perhaps Naruto sees a future where he has a son who is struggling with the same loneliness he once felt. So in the present, he focuses on creating a more inclusive and friendly environment in the village. Or maybe he sees a future where technology has overtaken ninjutsu, and he has to decide whether to embrace it or fight against it in the present.
In 'Naruto Future Memories Fanfiction', there could be a plot where Naruto's future memories show a world where the ninja villages have all been destroyed. He then has to find a way to change the course of history. He may start by looking into the root causes of the destruction in his memories, like a powerful and evil enemy that no one was prepared for. He might then gather all the ninja villages together to form a united front against this potential threat, using his knowledge from the future memories.
One idea could be an OC who is a time - traveler from the future. They come back to the Naruto world to prevent a great disaster that they know will occur in the future. This OC could have unique powers related to time manipulation or future - sight.
One interesting plot idea could be Naruto's son, Boruto, facing a new and powerful enemy that has ties to an ancient evil from the past that was thought to be sealed away long ago. This enemy could be manipulating the new generation of shinobi in the Hidden Leaf Village, causing chaos and mistrust among them.
One possible plot twist could be that Naruto sees a future where his friends turn against him. This would shatter his world as he values his friendships deeply. He might then struggle to figure out what went wrong in the future and try to prevent it in the present.
One idea could be exploring how Naruto's children deal with new threats to the Hidden Leaf Village. Maybe they face a villain who has found a way to use ancient, forbidden jutsu that Naruto and his friends had long forgotten about.
One idea could be Naruto's son or daughter discovers a new and powerful jutsu that was lost in time. This jutsu could potentially change the balance of power in the ninja world.
Perhaps the characters from the Future Diary world end up in the Naruto universe. Yuno could form an interesting relationship with Naruto. She might see his strong will and be both intrigued and challenged by it. They could team up to fight common enemies, with Yuno's unpredictable and often violent nature contrasting with Naruto's more positive and forgiving attitude.
One idea could be time travel in the fanfiction. The main character goes to the future and discovers a world where technology has both saved and endangered humanity. For example, there are flying cars but also a great divide between the rich who can afford advanced healthcare and the poor who can't.
One interesting fanfiction could be 'Naruto's Vision of Tomorrow'. In this story, Naruto starts having strange dreams that turn out to be visions of the future. It shows how he struggles to understand and change the events he foresees. Another great one is 'Future Sight: Naruto's New Path' where his ability to see the future makes him question his every decision in the present. And there's also 'Naruto and the Prophecy of the Future' which delves into how Naruto uses his new - found power to protect the village from threats that he anticipates.
One possibility could be that in the fanfiction, Kushina and Minato see Naruto becoming a great Hokage, respected far and wide. They might see him bringing peace to the village and forging strong alliances with other nations. This would make them extremely proud as they watch from whatever afterlife or special visionary state they are in.