In some fanfictions, Naruto's parents might regret not being able to teach Naruto about his heritage. Minato was a great ninja and Kushina had her own unique abilities. They see Naruto fumbling in the dark about his Uzumaki lineage and feel bad. They could also regret not being able to introduce Naruto to his extended family members. For example, if there were other Uzumaki out there that Naruto could have known and learned from.
Some fanfictions show that Naruto's parents regret not being able to give Naruto a normal family life. They think about how Naruto had to grow up alone in a small apartment, eating instant ramen. They regret not being able to have family dinners, celebrate birthdays, or just be there for Naruto when he was sick or sad. They might also regret not being able to see Naruto develop his own family in the future.
In these fanfictions, a common theme is self - reflection. Naruto's parents reflect on their past actions and decisions that led to their current state of regret. Another theme is the concept of redemption. They may try to find ways to make up for their absence in Naruto's life, even if it's just in the spiritual or dream realm. Also, there's the theme of connection, as they yearn to reconnect with Naruto on an emotional level.
One interesting plotline could be that Harry's parents return and have to adjust to the modern wizarding world. They might be shocked by the changes since their time, like new spells or magical devices. For example, they could be amazed at how easily wizards can communicate over long distances with things like the two - way mirrors that have been improved upon.
A plotline could involve Naruto being disowned and then finding out that his parents were actually being controlled by an enemy. He then has to decide whether to forgive them or not while also dealing with the new threat. Or perhaps Naruto is disowned and he starts to form his own ninja group of outcasts, fighting against the traditional ninja villages that shunned him. This could lead to a whole new set of power dynamics and battles.
One possible plotline could be Naruto growing up on his own, but then discovers some hidden secrets about his parents that change his perspective. Maybe he finds out they had no choice but to leave him. Another could be that Naruto, after feeling abandoned, decides to prove himself to the village in an even more extreme way, like taking on super dangerous missions at a young age.
One plotline could be Harry finding a new family among his friends at Hogwarts. They become his support system and help him grow in ways his biological parents couldn't. Another could be Harry's journey to discover why his parents disowned him and uncovering some dark family secret along the way.
One possible plotline could be Naruto growing up feeling extremely lonely and trying to find ways to gain his parents' attention even though they're not around. He might start to excel in ninja training not just to prove himself to the village but also in the hope that his parents would be proud if they were there. Another could be Naruto having vivid dreams about his parents and then waking up to the harsh reality of their absence, which could fuel his determination to find out more about them and why they ignored him.
A plotline could involve them discovering new magical abilities or powers as a result of this trauma. It's possible that the emotional upheaval of being disowned unlocks latent magic within them. They could then use these new powers to not only better their own situation but also to help other outcasts in the wizarding world. Maybe they start a secret group for those who have been rejected by their families.
A plotline could involve Sakura's friends and how they support her through the mourning process. Some might be really understanding and helpful, while others might not know how to deal with it. There could also be a part where Sakura has to face the reality of life without her parents financially. Maybe she has to find a job or deal with debts that her parents left behind, all while trying to keep her emotional state in check.
One idea could be exploring how Naruto's father, Minato, and Hinata's father, Hiashi, first met and their initial impressions of each other. Maybe they were involved in a joint mission and had to overcome differences in their clans' traditions to work together effectively.
One possible plotline could be Harry trying to find out why his parents forgot him. Maybe he discovers a dark spell was cast on them. Another could be his journey to regain their memories, facing many challenges along the way.