One plot idea could be that they discover their relation early on. Naruto, being his usual positive self, tries to get closer to Sasuke right away. Sasuke, on the other hand, is initially in denial but gradually warms up as they start to train together more often. They could team up against stronger enemies earlier in the story, using their combined skills and the new - found bond of being half - brothers to their advantage.
One plot idea could be that they discover their brotherhood early on and train together more closely. They might combine their unique abilities, like Naruto's Rasengan and Sasuke's Chidori, to create new and powerful jutsus. This could change the whole dynamic of the story, with them facing challenges as a united front instead of rivals.
One idea could be that they grow up with a new sense of family loyalty. They might support each other in ways different from the original story. For example, Sasuke could be more open about his feelings because he has Naruto as a true brother. Another plot could be them facing challenges together that are specifically related to their adopted family status, like dealing with the expectations of their new family or protecting their new family from threats.
A really interesting plot could be that Naruto and Sasuke, as brothers, are on a quest to find the origin of the Sharingan. Along the way, they meet different characters who have different views on the Sharingan. Some see it as a curse, while others see it as a gift. This journey makes them question their own beliefs about power and family. As they get closer to the truth, they also face challenges from those who want to keep the origin of the Sharingan a secret.
One idea could be that they discover they are blood brothers during a dangerous mission. This revelation then changes their entire dynamic and they start to fight side - by - side with a new level of unity. Another could be that there is a hidden prophecy about the two of them as blood brothers saving the ninja world in a unique way that no one else could.
One plot idea could be Naruto exploring his godly powers. Maybe he discovers he can communicate with spirits on a different level. For example, he could have the ability to see the past and future of the ninja world through his god - half. Another idea is that he has to face off against an ancient evil that only his god - like powers can defeat.
Maybe in the fanfiction, Naruto and Sasuke enter a tournament together. They support each other throughout the battles, with Sasuke using his sharingan to analyze opponents' moves and Naruto using his shadow clones to create diversions. Their combined efforts and the way they cheer each other on is like real brothers.
Perhaps in this fanfiction, they are the only ones who can stop an ancient evil that has been awakened. They are inseparable in the sense that they are constantly protecting each other. Naruto might use his Rasengan to create openings, Sasuke with his Sharingan to analyze the enemy's moves, and Sakura to heal any injuries they sustain immediately, making them an unbeatable trio.
One plot idea could be that Naruto and Sasuke grow up knowing they are brothers. They train together secretly, combining Naruto's Uzumaki stamina and Sasuke's Sharingan abilities. This leads to them creating unique jutsu. Another could be that their brotherhood is a secret from the village, and they have to protect this secret while still trying to save the village from threats.
One plot idea could be that Sasuke sees Naruto getting closer to Sakura during a mission. He becomes possessive and starts to interfere in their interactions, creating tension within the team. For example, he might try to take over tasks that Naruto and Sakura are doing together just to be near Sakura.
A possible plot could involve Sasuke and Female Naruto having to deal with family issues regarding their engagement. For Naruto, it could be about her father figure's reaction or lack of family traditions to follow. For Sasuke, it could be about his clan's expectations. They could also have a plot where they try to combine their different ninja styles in a joint training session as part of their preparation for a future together as a married couple.