In these fanfics, Nagato may help Naruto on an ideological level. Nagato once believed in a very different way of achieving peace. By sharing his journey and how he came to realize the flaws in his thinking, he can guide Naruto in his pursuit of true peace. Nagato could also use his influence over the Akatsuki remnants to prevent them from causing more chaos, which in turn helps Naruto in his mission to protect the ninja world.
The Legend of Uzumaki Hiroto was a derivative work of Naruto, which told the story of Uzumaki Hiroto's growth and the stories of other characters. Uzumaki Boto Legend was different from the original Naruto Naruto Shimbun Legend, so it was considered an independent manga.
It depends on the specific plot of the fanfic. Sometimes he could be on a secret mission, in a hidden village, or facing a new challenge in an unknown location.
He could be more light - hearted. Instead of being burdened by his past immediately, he might start off with a more positive outlook. For instance, he could be curious about the new world around him and approach things with a sense of wonder.
There might be. In the Naruto series, both Naruto and Nagato have complex backstories. If they were brothers in a fanfic, it would be really interesting. Maybe Naruto could have influenced Nagato to take a different path earlier. For example, Naruto's positive attitude towards life and his belief in peace could have rubbed off on Nagato, preventing him from going down the more violent routes he took in the original story.
In a time - travel Nagato fanfiction, he could travel to the future. He'd be shocked to see how the world has changed. Maybe he'd find that the ninja world has achieved peace through different means than he had envisioned. He could then return to his own time and try to implement some of those future ideas in his own era, like new ways of training ninjas or diplomatic strategies between villages.
Well, he could start a family with Hinata and have lots of kids, passing on his Uzumaki bloodline. Then, he could encourage his friends who have some Uzumaki connection, like Karin, to also have families and pass on their Uzumaki genes. He could also set up a school or training center in the Uzumaki land, teaching the Uzumaki ways of life and ninjutsu, which would attract orphans or those who want to be part of the Uzumaki clan.
They are not appropriate. The Naruto series is known for its action, adventure, and positive themes. Lemon fanfics that may contain sexual or explicit content are not in harmony with the family - friendly nature of the original Naruto work. It's better to focus on fanfics that respect the original themes and values of the series.
A really interesting plot could be Naruto traveling back in time to the era before he was born. He could meet his parents and other important figures in the village's history. This would give him a chance to understand the roots of the village better and also learn some new jutsu or strategies that he could bring back to his own time to make the Hidden Leaf even stronger as a Hokage.
Naruto could also express his love in a more playful way. He might tease the reader a lot but in a loving manner. And he'd bring her little gifts, like a special kunai he found on one of his adventures or some flowers from the outskirts of the village. He'd want to make the reader laugh and feel special all the time.