You can try some well - known fanfiction websites like FanFiction.net or Archive of Our Own (AO3). Just use the search terms 'dragon naruto neglected' on these platforms, and you should be able to find relevant stories.
One could be a story where Naruto has a hidden dragon - like power that has been neglected. Maybe in a fanfic, he discovers this power when facing a powerful enemy alone in a forest. His friends don't believe in this power initially, but as he starts to master it, they come to see its potential.
Perhaps in this fanfiction, Naruto is neglected because of a prophecy that foretells of his great power which scares the people in his village. He then stumbles upon a way to enter the Dragon Ball universe. In this new universe, he meets Bulma who is intrigued by his strange powers. With her help, he tries to find a way to either go back to his world and prove his worth or make a new life in the Dragon Ball universe. Along the way, he gets into battles with the likes of Frieza when the tyrant tries to take over a planet that Naruto has come to care about.
One interesting concept could be the idea of a dragon in the Naruto universe being neglected. It might explore how this dragon's existence is overlooked by the main characters, perhaps leading to unforeseen consequences later. For example, the dragon could hold a power that could have been useful in a major battle but was ignored.
These fanfics are interesting because they give a sense of novelty. In the Naruto world, we are used to the regular ninja elements, but when a neglected dragon is introduced, it's like opening a new door. It can create a whole new world within the Naruto universe. The dragon can have different forms, powers, and motives that contrast with the existing Naruto lore. It also allows for more complex character arcs. Naruto might have to overcome his own prejudices or lack of understanding about the dragon at first. And as the story progresses, the relationship between Naruto and the dragon can grow in unique ways, making for a very engaging read.
One possible plot could be that in a world where Naruto characters co - exist with Dragon Ball Z characters, Naruto is so focused on his own ninja world problems that he completely overlooks the power and significance of the Dragon Balls. For example, villains from the Naruto world might accidentally stumble upon the Dragon Balls and try to use them without understanding their true power. Meanwhile, Goku and his friends are trying to retrieve the balls from this new, unaware threat.
The Z - fighters like Krillin and Yamcha would be curious about Naruto. Krillin might try to befriend him quickly, while Yamcha might be a bit jealous if Naruto starts getting a lot of attention. In the Naruto world, characters like Sakura and Sasuke might not even notice Naruto's disappearance at first if he has been neglected. But later, they might realize the importance of Naruto when things start to go wrong in their world without him. And in the Dragon Ball universe, Piccolo would be very watchful of Naruto, trying to figure out his motives and if he poses any threat to the safety of the planet.
One common theme could be self - discovery. Since Naruto is neglected, he might find solace and a sense of purpose in summoning dragons. Another theme could be power - growth. He has to overcome his neglected state and grow in power with the help of his dragon - summoning abilities. Also, friendship might be a theme as he could form bonds with the dragons or other characters who recognize his worth.
One way the storyline can develop is through a conflict. Maybe the neglected Dragon Slayers are being hunted in the Naruto world because they're seen as a threat due to their unknown powers. This forces them to either fight back or find a way to make peace with the Naruto characters. Another development could be that a Dragon Slayer character befriends a Naruto outcast. Together, they try to change the perception of the Dragon Slayers in the Naruto world.