Perhaps his early birth gives him an edge in his ninja training. He could start learning advanced techniques sooner than in the original story. This might cause the village elders to take a different approach to him, either seeing him as a greater threat or a more valuable asset right from the start.
It could still be Orochimaru. His plans for immortality and power - seeking don't really depend on Naruto's birth time. So he would still be a major threat to the village and Naruto himself.
Well, his super powers might make him a target at first. People could be either jealous or scared of him. So he might have a hard time making friends. He'd also probably attract the wrong kind of attention from some villains who want to use his powers for their own evil plans.
In the 'izuku born a year early fanfiction', it could mean that he enters the hero academy a year earlier. This would put him in a different class dynamic. He might face more challenges as he's younger and less physically developed compared to his classmates, but his determination could still shine through and he could form unique relationships with his peers and teachers.
In a great deal of Naruto fanfiction, Naruto is indeed born in Uzumaki. This can add depth to his character as the Uzumaki clan has a rich history and unique abilities. Writers may use this to create stories where Naruto discovers his true Uzumaki potential earlier, perhaps having access to powerful sealing techniques from a young age, which could completely change the course of his life and the story as a whole.
In some fanfictions, if Naruto was born in Ame, he might have a very different upbringing. He could be exposed to the harsh environment and unique culture of Ame from the start. This might make him more cynical or street - smart compared to his original self in Konoha.
Yes, in fanfiction, anything can be possible. Writers can create alternate universes where Naruto is born in Kumo instead of Konoha. They can come up with various reasons for this change, like a mission that led his parents to Kumo before his birth or some sort of political arrangement.
Well, if Naruto was born a girl, it might change how she's perceived by the village and her interactions with other characters. It could also affect the way she develops her skills and powers.
Iruka - sensei would be a likely candidate. He has always seen the potential in Naruto and has been like a father figure to him in some ways. He might advocate for Naruto's early graduation because he believes Naruto has what it takes. Also, Kakashi - sensei could be another one. He has seen Naruto's growth and determination during their training sessions and might think that Naruto is ready to move on to the next level earlier than others.
One idea could be that Naruto has a unique connection to Mei's village due to being born to her. Maybe his skills are influenced by the culture and jutsu of her village. For example, he could have an affinity for water - based jutsu like Mei does.