Well, their chakra reserves could be much larger. In the original series, they already had significant amounts, but as sons of the Sage, they might have near - limitless chakra. Their ability to use nature - based jutsu could be enhanced. For example, Naruto might be able to call upon more powerful wind - based attacks more easily, and Sasuke could have more control over his fire and lightning techniques with a deeper connection to the natural elements.
Some fanfictions might show Ashura's power as being able to heal not just physical wounds but also emotional and mental traumas. This is a departure from the original series. As for Indra, his power could be shown to have a corrupting influence on the environment. For instance, when he uses his Sharingan to its fullest, the area around him starts to wither as if his power is draining the life force from the surroundings. This is a much more extreme take on his power compared to the original Naruto series.
As babies in fanfiction, Naruto might be more subdued. In the original series, Naruto is very loud and rambunctious, but in fanfiction as a baby, he could be more quiet, perhaps because of some early trauma or a different upbringing. He may still have his kind heart, but show it in a more reserved way.
One common plotline could be their discovery of their heritage as sons of the Sage. They might face unique challenges and powers related to it. For example, they could have a stronger connection to nature and chakra than other ninjas. Another plotline could involve them uniting the ninja world in a new way, using their special status to bring about peace and understanding among different clans.
In the original Naruto series, the five elements are well - defined and follow certain rules for chakra manipulation. In fanfiction, they might be altered or combined in more creative ways. For example, a fanfiction might have a character who can blend fire and water elements in a unique way that isn't seen in the original.
Well, Naruto has the power of the Nine - Tails and his own Uzumaki chakra reserves. Sasuke has the Sharingan and later the Rinnegan. The Sage of Six Paths has the power of all six paths. They could combine their powers by Naruto using his chakra to fuel a large - scale attack, Sasuke using his visual jutsu to target and direct it, and the Sage's power could be used to enhance the overall effectiveness, perhaps by adding elements of the six paths like the ability to control life and death on a small scale within the attack.
Fanfiction expands on the existing Naruto powers in unique ways. In the original, the Sharingan has specific abilities. But in fanfiction, it could be evolved to have additional powers such as the ability to predict not just an opponent's moves but also future events in general. Also, some fanfictions introduce hybrid powers that combine different ninja techniques from different clans. For example, a character might have a power that combines the Inuzuka clan's beast - like abilities with the Hyuga clan's gentle fist technique, which creates a completely new and exciting power dynamic that is not part of the original Naruto series.
His powers would likely be enhanced to a godlike level. For example, his Rasengan might be able to destroy entire landscapes with a single throw. His speed could be so great that he appears to teleport. His chakra reserves would be seemingly infinite, allowing him to spam powerful jutsus without getting tired.
In fanfiction, Naruto might be portrayed as more emotionally vulnerable around Sasuke. In the original series, he was always very boisterous and positive, but in fanfiction about their brotherly relationship, he could show his insecurities to Sasuke more openly. For example, he might talk about his fear of not being good enough as Hokage. Sasuke, on the other hand, could be shown as more patient. In the original, he was often brooding and impatient, but here he listens attentively to Naruto's concerns.
In some fanfictions, Naruto, Hinata and Sasuke's relationships can be drastically different. Naruto and Hinata could start a relationship based on a shared interest in a new form of ninjutsu that Hinata discovers. This brings them closer together in a way that wasn't shown in the original. Sasuke, on the other hand, could be forced to live with Naruto and Hinata for a period of time due to some village regulations. During this time, he sees their relationship up close and it makes him re - evaluate his own ideas about relationships and loyalty. He might start to see the value in what Naruto and Hinata have and become more protective of them.
In some fanfictions, their relationship might be more amicable from the start. Instead of the initial rivalry and Sasuke's aloofness, they could be shown as fast friends who support each other right away. For example, Sasuke might be more open about his admiration for Naruto's determination early on.