Well, in such a fanfiction, Naruto being a Kryptonian would mean he has heat vision. This new power could be used in battles against the Akatsuki. Instead of using Rasengan, he could simply use his heat vision to take out opponents. Also, his invulnerability would make him a force to be reckoned with. He could walk through most attacks without a scratch. His character might also change as he has to deal with these new powers and the responsibility that comes with them. It's an interesting concept that would mix the Naruto world with the Kryptonian lore.
If Naruto becomes the leader of Akatsuki, it would completely flip the Naruto universe on its head. First, Naruto's ideology of peace and friendship would clash with Akatsuki's original goals of collecting tailed beasts. He might try to reform Akatsuki from within, turning it into a group that actually protects the villages instead of causing chaos. This could lead to some very interesting alliances. For example, he might be able to convince some of the Akatsuki members who have their own tragic backstories, like Sasori or Deidara, to join his new cause. Also, the other villages' reactions would be mixed. Some might be extremely suspicious at first, while others could see it as an opportunity for a new kind of peace in the shinobi world.
Well, for one, Naruto's physical strength would be off the charts. The Saiyan DNA could make him stronger with each battle he endures, thanks to the Zenkai boost. And the Kryptonian DNA would grant him powers like super strength, flight, and heat vision. His speed would also increase dramatically. He could move at super - fast speeds like a Saiyan in their transformed states and also with the enhanced speed that Kryptonians possess. His chakra control might also be affected. He could potentially use his chakra in new and more powerful ways, perhaps even combining it with the energy manipulation abilities that Saiyans have. All in all, he would be a completely different and much more powerful Naruto.
In a fanfiction where Naruto becomes Obito, it could be due to an outside force. For example, an ancient evil entity that wants to disrupt the balance of the ninja world. It targets Naruto and messes with his mind, implanting Obito - like thoughts and desires. Naruto would then struggle between his original self and this new, Obito - influenced persona, leading to many internal and external conflicts within the story.
In such a fanfiction scenario, the village of Konoha would be affected too. Minato is a respected figure. His abandonment could cause a scandal. Naruto might not have the same level of protection from the village elders. This could lead to different power dynamics within the village. Maybe other ninja clans would try to take advantage of Naruto's situation. Also, Kushina's family might react in various ways, some might try to find Minato and some might focus on taking care of Kushina and Naruto.
Well, if Naruto was born in Iwa, the whole story would be flipped on its head. For one, he'd grow up with different values and training methods from Iwa. His relationships would be completely different. Instead of having friends like Sasuke and Sakura from Konoha, he'd have Iwa comrades. His ninja way might be more in line with Iwa's harsh and competitive environment. Maybe he'd be more aggressive in his fighting style. Also, the relationship between Iwa and Konoha would be more complex as Naruto could potentially be a bridge or a source of conflict between the two villages.
In a fanfiction where Naruto is Rias' brother, the Naruto storyline would be altered significantly. Naruto's nature as a person might change due to the influence of the devil society. He may become more sly or strategic in the way devils are. His fighting style could incorporate more magic - like elements from the DxD world. His backstory would now involve being part of a devil family. His relationships with his friends in the Naruto world would be less prominent as he'd be more involved with the devils. For example, instead of going on missions in the ninja world, he'd be involved in devil - related tasks to protect his sister and their family's status.
Naruto could use his chakra control to enhance his Kryptonian super speed. For instance, he could focus chakra on his legs while using his Kryptonian speed to move even faster and more stealthily. Also, his shadow clone jutsu could be combined with his Kryptonian powers. He could send clones with super strength or heat vision to attack enemies from different directions.
If Naruto was born with Mokuton, the story would change significantly. For one, his relationship with the Hidden Leaf Village might be different. The Mokuton was a feared and powerful ability due to its connection with the First Hokage. Naruto could be seen as a greater threat initially. He might also have been trained differently. Instead of focusing on the Rasengan and Sage Mode, he could have been taught more nature - based jutsu related to Mokuton earlier on. This could have led to him being more powerful at a younger age and potentially changing the outcomes of many battles, like the fight against Orochimaru where he might have been able to defeat him more easily with Mokuton - based attacks.
If Naruto becomes Madara Uchiha in fanfiction, it could drastically change the plot. Firstly, the relationships would be turned upside down. Naruto's friends might see him as an enemy, especially Sasuke who has a complex relationship with the Uchiha legacy. The power dynamics in the ninja world would also shift. Naruto, with Madara's power and knowledge, could either rule with an iron fist or try to reshape the world in a more extreme way compared to his original goal of peace. And the Akatsuki's plans would likely be disrupted as Naruto, in Madara's form, might have different motives regarding the tailed beasts.
Well, in this fanfiction, Naruto might become a chef because he wants to bring people together through food. Since he's always been about unity, he could start a small eatery where people from different villages can come and enjoy a meal. He'd probably make dishes that are inspired by his travels. He could incorporate different elements from the places he's visited during his ninja missions. Also, his friends like Sasuke and Sakura might be his first customers and give him feedback. Naruto would be the kind of chef who puts his heart into every dish, just like he put his heart into protecting the village.