The fanfic could be centered around Sasuke's best friends, Naruto and Sakura, and how they interact with Sasuke's Sharingan. For instance, Naruto might be curious about the Sharingan's abilities and constantly ask Sasuke to show him new tricks. Sakura, being a medical ninja, could study the Sharingan's effects on Sasuke's body to ensure he doesn't overuse it and harm himself.
In a fanfic like this, Sasuke's Sharingan could be the key to unlocking a hidden power within his best friends. Maybe his Sharingan has a special connection to Naruto's Nine - Tails chakra. As they fight side by side, Sasuke uses his Sharingan to guide Naruto in controlling the Nine - Tails better. Sakura, on the other hand, could learn new medical jutsu inspired by the insights from Sasuke's Sharingan, deepening their bond as they all grow stronger together.
In this fanfiction concept, Naruto and Sasuke as brothers could lead to a very different Naruto universe. With Sasuke having the Sharingan, he could potentially use it to protect Naruto more often. Maybe they would train together in new ways, combining Sasuke's Sharingan - related jutsu with Naruto's Uzumaki power. For example, Sasuke could use his Sharingan to analyze Naruto's chakra flow and help him master new forms of the Rasengan faster.
In such a fanfic, there could be epic battles. Naruto's Godlike Sharingan might enable him to use powerful jutsu with greater precision. Sasuke, as his best friend, would be by his side in these battles, providing support. For example, Naruto could use his Sharingan to see through genjutsu quickly, and Sasuke could use his own skills to complement Naruto's. Their friendship would also add an emotional depth to the story, with moments of trust and loyalty.
One great fanfic could be about Naruto's journey with his Godlike Sharingan abilities and how his friendship with Sasuke plays a crucial role. Maybe it focuses on their adventures together, facing powerful enemies. Naruto's Sharingan could give him unique powers like predicting enemy moves accurately. And his bond with Sasuke might be tested in various dangerous situations but always remains strong.
Naruto might adapt by first trying to understand the basic functions of the Sharingan. He could start with the simple ability to see chakra flow more clearly. Since he has always been perceptive about people's emotions, he could use the Sharingan to read the emotions of his enemies through their chakra, which would help him in battles.
One key element is the power dynamic. The Sharingan gives Sasuke a unique power, and how that power is balanced with Naruto's own strength is often explored. For example, in some fanfics, Naruto has to find ways to keep up with Sasuke's Sharingan - enhanced abilities.
One common theme is the power struggle. Since the Sharingan is a very powerful ability, many fanfictions explore how Naruto and Sasuke deal with the power that comes with it. For example, they might struggle with the temptation to misuse it or have to learn to control it.
Another theme is the bond between Naruto and Sasuke. Since the Sharingan can be a connection between them in some fanfictions, it's often used to explore their relationship. It could be about how they understand each other better through the Sharingan, or how it helps them to forgive and trust each other again. For instance, in some stories, the Sharingan reveals hidden emotions and memories that strengthen their bond.
Yes, there are many. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Naruto Eternal Sharingan Sasuke' and you'll find a bunch of them, but the quality may vary.