Naruto would face new and more powerful enemies. With the power of a god within him, there would be those who want to either steal that power or destroy him to prevent him from becoming too powerful. His life would be in constant danger, but he also has the means to defend himself better.
His social status would likely skyrocket. People would either revere him as a new deity or fear him. His friends might be in awe of his new powers and there could be a bit of a distance between them at first as they adjust to this new Naruto.
His view of himself would change. He has always been an underdog, but now he is something much more. He might struggle with the responsibility that comes with such great power. He would have to learn to use it for good and not let it corrupt him, which could be a long and difficult journey for him as he tries to balance his old self with this new, god - like identity.
His life would become much more complex. With multiple bijuu inside him, he has to manage more power and more voices in his head.
The power balance in the village would shift. Without Naruto as the Kyuubi Jinchuuriki, other ninja might step up to fill the role of the village's main protector. For example, Neji could have been groomed as a more powerful force. Also, the Akatsuki's plans might be different as they would not target Naruto for the Kyuubi. They might focus on other Jinchuuriki more intensively.
The Jinchuuriki's god - like status has a huge impact on the plot. Their abilities are so far - reaching that they can reshape the political and social structures in the Naruto world. They might be seen as a threat by some and a savior by others. This dichotomy can create complex relationships and storylines. Their powers can also introduce new elements to the plot, such as the discovery of ancient prophecies related to their god - like nature. As they explore their powers, they may uncover secrets about the origin of the Jinchuuriki and the world itself, which all contribute to the development of the plot.
Their relationship would likely become more interdependent. As Jinchuuriki, they would have to rely on each other for support and understanding. For instance, they might train together more often to master their powers, which would bring them closer.
Their relationship could become even stronger. They would have a deeper understanding of each other's power and the burden that comes with being a Jinchuuriki. They might rely on each other more for emotional support and in battles, as they are the only ones who can truly understand what the other is going through.
It would change his moral compass completely. Naruto, who was once the defender of the village and a symbol of hope, could now view the village as something to be used for his new, darker purposes. His values would be warped, and he might even see his friends as mere pawns to achieve whatever the evil god desires. For example, he could sacrifice his friends' well - being for power or to carry out the evil god's will. This is a huge transformation from his original character.
The God Tree could transform Naruto in multiple ways. Physically, he might have new markings or a different appearance due to the power infusion. Mentally, he could gain a deeper understanding of the world's secrets. This new knowledge might make him more cautious or more adventurous depending on how he interprets it. His relationships could also be affected. He may attract new enemies who are jealous of his newfound power or new allies who see him as a key to something greater. All these changes can create a more complex and evolved version of Naruto in the fanfiction.
The comet could make Naruto more respected in the village. If he gets amazing powers from it, people who once underestimated him might start to see his true potential and value him more.
His sense of justice could become more absolute. As a god, he may not tolerate any form of evil. He would strive to purge the ninja world of all dark elements. His power would allow him to enforce his version of justice, which could be both a good thing in terms of eliminating real threats, but also a bit scary as it might limit the free will of some ninjas who are not truly evil but just made some mistakes.
It would likely make Naruto more philosophical. As the reincarnation of a god, he might start to question the nature of power, destiny, and the world around him. This could lead to him having deeper conversations with his friends and mentors, and ultimately change his view of the ninja world and his place in it. For example, he might start to think about how to use his power not just for the sake of his village, but for the greater good of the entire world, which would be a huge shift in his character development.