One possible plot twist could be that Naruto's love for Kakashi from the past disrupts the timeline. Maybe his feelings cause him to unknowingly change events that were supposed to happen. For example, he might prevent Kakashi from making a certain decision that was crucial in the original timeline.
Well, it could be that Naruto's love is a result of something Kakashi did in the past that Naruto only fully realizes in the future. Like Kakashi saved Naruto's life in a way that Naruto didn't understand at the time but later, as he grows older, he looks back and falls in love with that version of Kakashi. So the plot could revolve around Naruto trying to go back in time to thank or be with Kakashi.
It could develop in a really interesting way. Since Naruto is from the future, he might have knowledge that he uses to protect Kakashi. This would make Kakashi curious about Naruto. As they interact more, they could start to develop a deep bond. Naruto might share some of his future experiences with Kakashi in a veiled way, and Kakashi would start to see Naruto in a different light, leading to a relationship that is based on mutual respect and a bit of mystery.
In this fanfiction, it could also be about Naruto going back in time to learn from Kakashi. Since Kakashi was a great ninja in the past, Naruto might want to gain some skills or wisdom that he didn't have the chance to learn before. They could form a unique bond during this time, different from their relationship in Naruto's original timeline. Kakashi could be initially suspicious of this strange Naruto from the future but gradually come to trust and mentor him.
A cool plot twist could be that future Obito is actually there to stop past Kakashi from making a certain decision that would have far - reaching negative consequences. Another one might be that past Kakashi discovers that future Obito has a hidden agenda that is not what it seems at first.
In this fanfiction, Naruto might look into the future and find out that the new generation of ninjas has lost their way. They no longer value the things he fought for, like friendship and hard work. So, he has to come up with a plan to inspire them again. He could start by sharing his own experiences and showing them the importance of the ninja way.
Another plot twist might be that Naruto reads a future where the entire ninja world is in ruins. This could lead him to take extreme measures in the present to prevent that future from happening. He might try to unite all the ninja villages in a way that has never been done before, facing many obstacles along the way as different villages have their own interests and grudges.
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 possible plot twist could be that Naruto actually steals something from Kakashi that he thought was unimportant, but it turns out to be a key to a hidden jutsu or a secret mission. Another could be that Kakashi knew Naruto was going to pickpocket him all along and let it happen as part of a training exercise. Maybe Naruto pickpockets Kakashi, but then realizes he has to return the item quickly because it's something that Kakashi needs to save the village.
Well, one plot twist could be that Naruto's love for Ino makes him question his long - held feelings for Sakura. He might start to notice all the things about Ino that he overlooked before, like her determination and her kind heart towards her friends. This could lead to some awkward and funny moments when he's around both Ino and Sakura.
One possible plot twist could be that Kakashi discovers Naruto has a hidden power that no one else is aware of. This could change the whole dynamic of their relationship. Maybe it's a new type of chakra that only Kakashi can help him control.
One possible plot twist could be that they face opposition from the Hidden Leaf Village. Since same - sex relationships might not be as openly accepted in the traditional ninja world. Another twist could be that they have to go on a dangerous mission together right after getting married, which tests their new relationship. And perhaps there's a secret enemy who wants to break them apart because their union represents a new kind of hope in the village.