Well, it could be about an overlooked or forgotten version of Naruto in fan - created stories. Maybe it focuses on a prototype concept of the Naruto world that didn't make it into the official series but is explored by fans in their fictional works.
You can try looking on some well - known fanfiction websites like FanFiction.net or Archive of Our Own (AO3). They have a large collection of Naruto - related fanfictions and there's a chance you'll find the 'naruto prototype neglected' one there.
In this fanfiction, the prototype powers could be something like an early form of chakra manipulation that is different from the traditional Naruto world's chakra use. It might be more raw and unrefined, with the potential for new and unique jutsu.
Perhaps he's been influenced by someone who gives him bad advice. For example, if someone tells him that natural talent is enough and training is overrated. Also, he could be dealing with some personal problems, like a conflict within his family or among his friends that takes up all his time and mental energy, causing him to neglect training.
He might start to rely on his friends more. For example, Sasuke and Sakura could become his main source of emotional support. He would focus on training with them and sharing his feelings, which in turn helps him to grow stronger and more independent.
In Naruto, the Jinchuuriki were often treated poorly. In fanfiction, this neglect can be explored in many ways. One common approach is to focus on the emotional and psychological impact on the Jinchuuriki. For example, they might feel isolated from the rest of the village due to the fear and prejudice associated with the tailed beasts within them. This can lead to some really interesting character development stories in fanfiction.
In a fanfiction, perhaps neglected Naruto runs away from Konoha and ends up in the same area as Yugito. Yugito, having also faced her own share of hardships, takes Naruto under her wing. They bond over their experiences, and Yugito helps Naruto to better understand his chakra nature by sharing her knowledge of the tailed beasts' chakra. This could lead to Naruto developing new abilities and a newfound confidence.
One reason could be that some fanfiction authors might focus more on other aspects like new jutsu or character relationships outside of the Uchiha clan. They may not fully understand the potential of Sharingan, which has a wide range of abilities from basic perception enhancement to powerful genjutsu. Another factor could be the over - popularity of some other elements in the Naruto universe, like the tailed beasts, which overshadow the Sharingan in their stories.
It might be explored through lack of training or guidance. Since he's godlike, the village might think he doesn't need any help. So, they neglect his development in terms of combat strategies or new jutsu, leaving him to figure things out on his own.
The angel bloodline might be neglected in the fanfiction due to the lack of connection to the existing Naruto lore. In the Naruto world, there are already established power systems and lineages. If the angel bloodline is not carefully tied to these existing elements, it may be pushed to the side. Additionally, the writer might be saving it for a big reveal later in the story, so it appears neglected in the early parts.