The consequences could be far - reaching. Naruto is a very emotional person. Watching his loved ones pass away could make him bitter or overly protective of the new generations. Politically, his immortality could disrupt the power balance in the ninja world. Villages might see him as a threat or try to use his immortality for their own gains. And on a personal level, he might struggle with the meaning of his own existence, as he has no end in sight.
If Naruto becomes immortal in a fanfic, one consequence could be that he would outlive all his friends. He would have to watch them grow old and die, which would be really sad. He might also become a bit of an outcast as he no longer fits into the normal cycle of life. People might start to fear him or see him as something other than human.
There would be a power shift. Since Madara was extremely powerful, Naruto - as - Madara would be an almost unstoppable force. Other villages would have to either ally with Konoha (which would be a difficult decision considering the situation) or try to find a way to counter this new threat. This could lead to a new arms race among the ninja villages.
One major consequence would be in terms of his abilities. Kushina was known for her powerful sealing techniques. So if Naruto becomes her, he might lose some of his unique Naruto - like skills and instead gain more proficiency in sealing. This could change the way he battles. For example, he might rely more on sealing away enemies rather than his usual Rasengan and Shadow Clone techniques. And his role in the village as a protector might also change as he adapts to Kushina's abilities.
The village would likely be in chaos. Naruto has been a key figure in protecting the Hidden Leaf. Without him, there would be a power vacuum, and enemies might see it as an opportunity to attack. The villagers who once relied on Naruto would be filled with fear and uncertainty.
One consequence could be a shift in Naruto's character development. Having his mother back might make him more at ease and less driven by his past loneliness. It could also change his relationship with other characters. For example, his bond with his father figure, like Iruka or Jiraiya, might not be as strong as it was when he was motherless. Another consequence could be in the political aspect of the ninja world. Kushina was an Uzumaki, and her return could strengthen the Uzumaki clan's position and influence, which might cause some unrest among other clans who fear the growing power of the Uzumakis.
Well, if Naruto goes evil in fanfic, it's a total game - changer. First, his relationships would crumble. Sakura and Sasuke would be devastated. His sensei like Kakashi would try to reason with him but probably fail. And his enemies would be thrilled. They could use his new - found 'evil' side to their advantage and cause more chaos in the ninja world.
In a fanfic scenario where Naruto becomes the Juubi, it's a game - changer. Firstly, his appearance would probably change significantly, maybe having some Juubi - like features. His speed, strength, and the range of his jutsu would increase exponentially. He could use the Juubi's power to heal the land that has been damaged by years of war. However, there would also be those who see him as a threat and try to stop him, believing that no one should possess such power. This would create a lot of conflict and drama in the fanfic.
Well, in a fanfic where Naruto becomes ruthless, the entire ninja world would be in chaos. He's a very important figure, and his change in personality would likely lead to different power dynamics. Villages might be more afraid of him, and he could start making decisions that are more self - centered rather than for the good of all. He might also use his powerful jutsu without much regard for the consequences, like his Rasengan or Sage Mode.
If Naruto becomes greedy in a fanfic, it could lead to a breakdown in his relationships. His friends might not recognize this new, greedy Naruto. For example, Sasuke could see this change as a betrayal of their ideals of friendship and rivalry. Naruto's greed might also make him a target. Enemies could use his greed against him, like dangling the promise of ultimate power in front of him to make him do their bidding.
If Naruto becomes a demon in a fanfic, it could lead to a whole new set of adventures. He might be shunned by the village he once protected. However, this could also be an opportunity for him to discover a new side of his power. He could use his demonic powers for good, but first he would need to overcome the prejudice against him. His relationships with characters like Sasuke and Sakura would be put to the test as they might not trust him immediately.
In some fanfics, if Naruto becomes Kyuubi, he might gain incredible power. He could have enhanced physical abilities like super strength and speed. His appearance might also change, taking on more Kyuubi - like features. Maybe his eyes would turn red like the Kyuubi's, and he could have a more menacing aura. This transformation could make him a more feared and respected figure in the ninja world.