One aspect could be that Naruto would become more family - oriented in the way the Uchihas are. He might start to value his blood relations more, or even try to create a new 'clan' of sorts around him. His fighting style could change to be more precise and calculated, like the Uchihas'. And he would have a greater sense of loyalty to those he considers his 'clan', which could lead to some interesting conflicts with his existing friends and village relationships.
Well, it could mean Naruto adopting the Uchiha's sense of pride. He might start showing off his skills more like an Uchiha would, with a certain arrogance. Also, he could become more brooding and mysterious, similar to Sasuke, an Uchiha. Maybe he'd even start wearing clothes in the Uchiha style, with a dark color scheme.
In a Naruto act like Near fanfiction, Naruto could develop Near's attention to detail. He'd be more likely to notice small things that others miss, like hidden traps or the slightest change in an enemy's behavior. This would give him an edge in battles and missions. Also, his decision - making might become more based on careful thought rather than just gut instinct.
The fanfiction could explore how Naruto Uchiha's character changes as the son of Zeus. He might become more confident, yet also more burdened. His relationships with his family and friends could be completely transformed. For instance, Sasuke might see him as a threat now that he has divine heritage. And Naruto would have to prove himself not just as a ninja, but as a worthy son of Zeus, perhaps by going on a quest to retrieve a powerful artifact that is important to both the ninja and godly worlds.
In a Naruto joins the Uchiha clan fanfiction, he could be adopted by an Uchiha. For example, if Sasuke had a change of heart early on and decided to bring Naruto into the clan. Naruto would then be exposed to the Uchiha's dark past and their thirst for revenge. He could use his own positive attitude to try and change the clan's perspective. And he'd surely have to train hard to keep up with the Uchiha's high standards in combat and ninja skills.
Well, in such a fanfiction, there could be a situation where the Justice League is facing a threat that they can't handle alone. So they seek help from the Naruto universe. The Uchiha clan's powerful jutsu could be a great asset. Sasuke, for instance, could use his Chidori in combination with the Flash's speed. It would be a battle of different powers and strategies. Also, Wonder Woman might find similarities between her Amazonian values and the values of the shinobi in Naruto's world.
His relationship with Sasuke would be really different. Instead of trying to bring Sasuke back to the village as a friend, he might see Sasuke as a rival in a more intense way, like two Uchihas competing. With Sakura, he might be more distant, as the Uchihas are often more reserved in their emotions. And his relationship with Kakashi could become strained, as Kakashi has his own history with the Uchihas.
Well, one possibility is that Naruto would grow up with a sense of family that he always lacked. Mikoto could teach him about the Uchiha traditions and values, which might be different from what he learned in the village. Also, Naruto's relationship with Sasuke could be very different as they would be sort of 'brothers' in a way.
It could be Sasuke's sister, if there was one in the fanfiction world. She might share some of Sasuke's traits but also have her own unique personality that attracts Naruto.
Perhaps in a fanfiction, Naruto and Akeno are both chosen to participate in a grand tournament that involves fighters from different universes. They train together, sharing their skills and knowledge. During the tournament, they face powerful opponents and have to rely on each other's support. Their bond grows stronger as they progress through the tournament, and they become not just partners but also very good friends.
The Uchiha might initially be filled with anger. Their trust in Naruto, if it was there before, would be completely shattered. They could start to plot revenge against Naruto, believing that he has wronged them. This could lead to a lot of tense moments in the fanfiction as the Uchiha gather their strength and resources.
In some fanfictions, Naruto could be made a full - blooded Uchiha through various creative plot devices. It might involve things like magic or some sort of genetic manipulation that rewrites his origin story. However, this is completely different from the original Naruto story where he is an Uzumaki.