Another possibility is that it could involve Naruto as a main character even though he doesn't have the Sharingan. His relationship with the character having the Eternal Sharingan could be explored. Maybe Naruto helps the character come to terms with their power or they team up to face a common enemy. This would add an interesting dynamic to the fanfic as Naruto's ideals and the power of the Eternal Sharingan collide and combine in different ways.
It could be Sasuke. Since he has the Sharingan, in fanfiction about the Eternal Sharingan, he might be a central figure, evolving his powers further.
There could also be original characters created specifically for this fanfic. These new characters might have their own motives related to the Sharingan. For example, a new character could be a researcher who is trying to unlock the ultimate power of the Sharingan and sees Naruto as a key subject. They could add a whole new dynamic to the story.
Power. The eternal mangekyou sharingan represents a great power in the Naruto world, so many fanfics focus on how characters use or struggle with this power.
There could be a young and ambitious ninja as the main character in 'naruto sharingan god fanfic'. This ninja starts out as an underdog but with the discovery of the Sharingan God, their life changes completely. There might also be a mentor - like figure, perhaps an old and wise ninja who has some knowledge about the Sharingan God and helps the main character on their journey. Additionally, there could be antagonists, like other power - hungry ninjas who want the Sharingan God power for themselves.
It could be Sasuke. Since the fanfic has 'Sharingan' in the title, Sasuke, who is well - known for his Sharingan abilities in the original Naruto series, might be one of the main characters.
I'm not sure exactly as it's a fanfic, but likely there will be a character inspired by Naruto. There might also be characters related to the Sharingan's origin or those who are affected by the power of the 'holy' Sharingan.
Sasuke Uchiha is often a central character. Since he already has the Sharingan in the original series, in fanfiction with the Eternal Mangekyo Sharingan, he can be further developed. His journey to master this new level of power and how it affects his relationships, especially with Naruto, can be a major focus.
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.
The 'naruto eternal sharingan fanfic' could center around the origin of the Eternal Sharingan in a unique fan - created story. It could explore the relationship between the character with the Eternal Sharingan and other characters in the Naruto world. For example, how their power affects their friendships or rivalries. It may also involve the character unlocking new abilities with the Eternal Sharingan that are not shown in the original series.
Another possibility is an ancient evil that has been awakened by the presence of Naruto's new power. The Eternal Mangekyou Sharingan might emit some sort of energy that disturbs an old seal or something. This ancient evil could be a powerful demon or a long - forgotten ninja with dark powers. It would be a huge threat not only to Naruto but also to the entire ninja world, and Naruto would have to use his new - found power along with his usual determination to stop it.