One common theme is redemption. Naruto gets a chance to overcome his past of neglect and grow into a stronger and more confident person. Another theme is the power of family. The adopted family often provides the love and support Naruto missed out on, which helps him in his journey.
One popular 'naruto neglected and adopted fanfiction' is 'A New Family for Naruto'. In it, Naruto is adopted by a kind shinobi who sees his potential and gives him the love and training he lacked. Another is 'Naruto: The Adopted Avenger' where his new family helps him become stronger while also dealing with his past traumas.
Well, in a 'neglected naruto adopted by sannin fanfic', Naruto's character development would likely be very different. The Sannin are all extremely powerful and have their own areas of expertise. If Naruto was adopted by them, he'd be exposed to a whole new level of ninja training and knowledge. He'd probably grow up with more confidence, as he'd have the support and guidance of the Sannin. His relationships with other characters like Sasuke and Sakura might also change. For instance, instead of constantly trying to prove himself to everyone in the village, he could focus more on becoming a great ninja under the Sannin's tutelage and might have a more equal footing when interacting with his peers later on.
One key element is the contrast. There's a big contrast between Naruto's neglected past in the village and his new life with the Sannin. Another is the training aspect. Since the Sannin are so powerful, Naruto gets to learn amazing jutsu from them. For example, he might learn Orochimaru's snake - related techniques or Tsunade's super strength techniques.
One great fanfic in this genre is 'The Sannin's New Apprentice'. It delves deep into Naruto's neglected past and how his life changes after being adopted by the Sannin. The story focuses on his training and the unique bond he forms with each of them. Another interesting one is 'Naruto: Sannin's Legacy' which shows Naruto growing in power and wisdom under their guidance, while also exploring his new family dynamics.
Well, in this fanfic, Naruto could start to heal from his past neglect. Tsunade might introduce him to different aspects of the ninja world that he was previously unaware of. For example, she could take him on diplomatic missions to other villages, which would expand his understanding of international relations among ninja clans. In terms of his growth as a ninja, Tsunade could also help him master some of the more advanced medical ninjutsu. This would not only make him a more versatile shinobi but also give him a new skill set to rely on in combat. And of course, their relationship could also face challenges, like when Tsunade has to make difficult decisions regarding the village that might put Naruto in a tough position.
Naruto's training would become more personalized. Tsunade, being a Sannin, has a wealth of knowledge. She might focus on Naruto's weaknesses more intently. For example, if Naruto still has issues with chakra control, Tsunade could design specific exercises just for him. His training could also include more strategic elements, as Tsunade is experienced in battle tactics.
Jiraiya would be the most interesting. He has a wild and carefree personality which could be a great contrast to Naruto's initially lonely and neglected state. Jiraiya is also very knowledgeable about the outside world and has many powerful jutsus, especially those related to the toads. He could take Naruto on adventures, teaching him not just about being a ninja but also about life in general. His connection to the prophecy about the 'Child of Prophecy' could also add an interesting layer to the story, as Naruto might be groomed in a different way to fulfill that prophecy under Jiraiya's guidance.
Perhaps he's been influenced by someone who gives him bad advice. For example, if someone tells him that natural talent is enough and training is overrated. Also, he could be dealing with some personal problems, like a conflict within his family or among his friends that takes up all his time and mental energy, causing him to neglect training.
He might start to rely on his friends more. For example, Sasuke and Sakura could become his main source of emotional support. He would focus on training with them and sharing his feelings, which in turn helps him to grow stronger and more independent.