Well, one possible plot could be that they accidentally meet in a bathroom during a mission. Naruto might startle Sasuke and they could get into a quick spar. Maybe they're in an old, run - down building and the bathroom is the only place they can have some privacy to hash out their differences. It could end with them realizing they still have a long way to go in understanding each other.
A fanfic could focus on Indra's training. We could write about the intense and arduous training he underwent to become such a powerful figure. It might involve secret techniques passed down in the Otsutsuki clan that only he was able to master due to his unique talent.
Another angle could be a fanfic where Indra Otsutsuki travels to a different dimension. He has to adapt to a completely new world with different rules and powers. It would be fascinating to see how his Otsutsuki abilities fare in this new environment and how he interacts with the local inhabitants.
Yes, there are likely some fanfictions with this concept. Fanfiction writers often come up with unique and creative ideas, and the idea of Naruto having some sort of special connection or relationship with Kaguya Otsutsuki in a fan - created story is not unheard of. It could involve Naruto exploring Kaguya's past, or perhaps having a role in her redemption in the fanfic's alternate universe.
Naruto's character might become more empathetic. After the fight, he has seen Sasuke's pain up close. So he could be more understanding of others' struggles. For example, when dealing with other rogue ninjas, he may try to find the root cause of their problems instead of just fighting them.
One possible plot could be that they face a powerful new enemy that threatens the Hidden Leaf Village. This enemy has unique abilities that require all three of them to combine their skills. Naruto uses his Rasengan, Sasuke his Chidori, and Sakura her superhuman strength to break through the enemy's defenses.
One possible reason could be a difference in their views regarding the future of the village. Sasuke might have some extreme ideas that Sakura, as a more village - centered person, can't accept. For example, Sasuke may think about taking some radical actions to change the shinobi world order which Sakura believes would put the village at risk.
One possible reason could be that Naruto has been pushed to his limit. Maybe Sasuke has said or done something that really strikes a nerve. For example, if Sasuke were to mock Naruto's dreams or the friends he has lost in his journey to protect the village. Naruto is a very emotional character, and when it comes to Sasuke, his emotions run even deeper. So, if Sasuke were to continuously reject Naruto's attempts at friendship or redemption in the fanfiction, it could cause Naruto to snap.
Some characters might be in awe of him. For example, his friends like Sakura and Kakashi could see him in a new light. They might be more cautious around him at first, not fully understanding the implications of his new bloodline. His enemies, on the other hand, would likely be more fearful or more determined to defeat him. The Hidden Leaf Village might also have a different attitude towards him. They could be both proud that one of their own has such a powerful bloodline, but also worried about the potential danger it could bring.
Well, his pure Otsutsuki blood might enhance his physical strength. For example, he could have greater stamina and be more resilient in battles. His dojutsu abilities could also be amplified. Maybe he can use the Sharingan or Byakugan in a more powerful way than normal. He might also have a natural affinity for Otsutsuki - related jutsu, like those involving space - time manipulation.