A really interesting scenario could be that Naruto and Sasuke are training in a place where there is a time - dilation effect. They end up spending what seems like months in the training area, but in the outside world, only a few days have passed. During this extended training time, they not only improve their combat skills but also their relationship. They share stories from their past that they never had the chance to before, and by the time they come out, they are both much stronger and closer as friends and comrades.
One possible plot could be that Naruto, having become much stronger and more experienced over the years, takes Sasuke under his wing to help him master new jutsu. Maybe Naruto teaches Sasuke some of his unique Rasengan variations, and they train in a secluded area away from the village. Along the way, they also have heart - to - heart conversations about their past and how they can better protect the village together.
In the fanfiction, they could be training under a strict master. This master gives them tasks that require them to combine their abilities. For instance, they have to work together to break through a powerful chakra barrier. Naruto's brute strength and Sasuke's precise chakra control are both needed. At first, they struggle because of their differences, but as they communicate more during the training, they start to synchronize their efforts and finally break through the barrier, growing closer as comrades in the process.
One possible scenario could be that Naruto snaps at Sasuke over his constant pursuit of power at the expense of their friendship. Maybe Sasuke makes a decision to leave the village again for more power, and Naruto, tired of his friend's self - destructive ways, snaps and tries to make him see reason.
One interesting scenario could be a fight in an alternate dimension where the rules of chakra are different. This would force both Naruto and Sasuke to adapt new strategies. Another could be a battle where they are forced to team up against a common enemy first before their duel, which would add a complex layer of emotions and dynamics.
One plot idea could be that chibi Sasuke, with his precocious nature, looks up to older Naruto who has become a respected ninja in the village. Sasuke could be constantly trying to prove himself to Naruto, leading to various comical and heartwarming adventures as Naruto mentors him in a way.
One interesting scenario could be baby Sasuke and baby Naruto getting into innocent mischief together in the Hidden Leaf Village. Maybe they accidentally let all the chickens loose in the market area while playing a game of chase.
One interesting scenario could be that Naruto and Sasuke discover a new power within themselves during the fight that changes the whole dynamic. Maybe Naruto unlocks a new form of Sage Mode that gives him an edge, and Sasuke responds with a new sharingan evolution.
One great 'older Naruto x Sasuke fanfic' is 'The Bonds of Time'. It beautifully explores their relationship as they've grown older. It delves into how they support each other in new challenges in the shinobi world. The story has some really touching moments that show the depth of their bond.
One common scenario is Naruto training with a new or unexpected mentor. For example, he might train with a powerful and reclusive shinobi from a far - off village who has unique techniques to teach. Another is training in a special environment like a pocket dimension filled with dangerous beasts that force him to quickly level up his skills. Sometimes he'll train in a team with other characters who also have something new to offer, like a combination of taijutsu and ninjutsu training that he hasn't experienced before.
A good 'older Naruto x Sasuke fanfic' should have a strong portrayal of their matured personalities. They are no longer the impulsive kids they once were. For example, Naruto might be more diplomatic as Hokage, and Sasuke more understanding of the village's values. Also, their relationship should be complex and deep, not just a simple friendship. It could involve them relying on each other in different ways, like Sasuke using his skills to support Naruto's leadership and Naruto being there for Sasuke's emotional struggles.