If they are cousins in fanfiction, it could change the whole dynamic of the ninja world. Their combined strength as family members could be a threat to their enemies. They might be able to use their family connection to bring peace to the villages in a different way. Maybe they could form a new kind of alliance based on family rather than just friendship or rivalry. And this could inspire other ninja clans to also seek peace through family connections.
A fanfiction concept could be that as cousins, they have a shared family jutsu. However, it has been lost over time. So, Naruto and Sasuke team up to find and relearn this jutsu. Along the way, they face many challenges and enemies. This adventure not only strengthens their bond as cousins but also makes them stronger ninjas.
In a fanfiction, they could be involved in a race. Naruto's speed, Sasuke's sharingan - enhanced perception, and Hinata's byakugan - aided navigation could all play a part. Maybe they start off competing against each other but then realize that there's an outside threat during the race. So they put aside their differences and work together to overcome the threat, forging a stronger bond in the process.
In this kind of fanfiction, one possibility is that they go on a journey to discover new jutsu together. They might leave the Hidden Leaf Village to find a place where they can train without the constraints of the village rules. Maybe they encounter new and powerful enemies that force them to rely on each other more than ever, strengthening their bond.
Well, it could be that Sasuke captures Naruto as part of a plan to protect him from a greater threat that Naruto is unaware of. Maybe Sasuke has some inside information about a powerful enemy who is targeting Naruto, and by 'capturing' him, he can keep Naruto in a safe place until the danger passes.
One possibility is that the story could focus on the emotional journey of the characters. For example, if Sakura is pregnant, she might be worried about how her friends and the village will react. Naruto could be there to support her, offering his positive energy and friendship. Sasuke might be more reserved in his support but still be there in his own way.
In this fanfiction scenario, their teamwork could reach a new height. Hagoromo would likely train them together, so they would understand each other's strengths and weaknesses better. Naruto's optimism and Sasuke's more brooding nature could be balanced out under Hagoromo's guidance. They might also learn new joint - attack techniques. For example, they could combine Naruto's Rasengan and Sasuke's Chidori in a way that is more powerful and versatile than before. Their bond as friends and comrades would be strengthened, and they would be better equipped to face any future threats to the ninja world.
There could be a situation where the inn is under attack by a common enemy. Itachi, Sasuke and Naruto have to put aside their differences and work together to defend it. They use their unique skills - Itachi's genjutsu, Sasuke's fire - based jutsu and Naruto's shadow clones - to fend off the attackers. This experience bonds them in a new way and they leave the inn with a newfound respect for each other.
Well, they might go on an adventure to discover new jutsus. Sasuke could be on a mission to learn more about his clan's secrets and takes Naruto along for the ride because he knows Naruto's strength. Maybe they'll encounter powerful enemies and have to rely on each other to survive.
If they become gods, they would probably have the ability to control natural elements on a much larger scale. Naruto could make the sun shine brighter to bring more warmth and energy to the land, while Sasuke might be able to manipulate the stars and use their energy for different purposes. Their new status would also put them above all the political struggles in the ninja world, and they could act as true guardians of the whole world.
In some fanfictions, Naruto might be indifferent to Sasuke if the author wants to explore a different dynamic. Maybe Naruto has had a life - changing experience that makes him focus more on other things like the well - being of the village as a whole rather than just Sasuke. It could also be due to a misunderstanding or a new friendship that overshadows his previous intense connection with Sasuke.