In this type of fanfiction, a common theme could be the power of love. Minato's love for Naruto might be emphasized as he watches his son endure hardships. It could also explore the theme of isolation. Naruto may feel isolated in his suffering, and Minato, despite being an observer, might also experience a sense of isolation as he can't directly intervene. Another aspect could be the theme of redemption. Minato might see Naruto's suffering as a way for Naruto to redeem himself or the Uzumaki name in some way.
One possible theme could be regret. Minato might feel regret for not being there to protect Naruto, which adds to the emotional turmoil as he watches his son suffer. Another theme could be the cycle of pain. Naruto's suffering might be seen as part of a larger cycle that Minato was unable to break. Also, there could be a theme of growth through adversity. Even though Minato is just watching, Naruto's suffering could lead to his growth as a character, and Minato might witness this transformation.
Well, one theme might be sacrifice. Minato sacrificed himself for the village and now has to watch Naruto suffer, which could be a way to show the long - term consequences of his sacrifice. There could also be a theme of father - son relationship. It might explore how Minato's absence has affected Naruto's life and how Minato feels about seeing his son in pain. Additionally, a theme could be the search for purpose. Naruto's suffering could be part of his journey to find his true purpose in life, and Minato watches this journey unfold.
Well, one antagonist could be Sasuke. If he goes down a dark path again, his actions could cause Naruto great pain. Minato would then watch as Naruto tries to deal with his best friend's betrayal or attacks. Zetsu is also a potential antagonist. He has his own hidden agendas and could be manipulating events behind the scenes to make Naruto suffer. And there are always the hidden threats within the shinobi world, like certain hidden village leaders who might see Naruto as a threat and try to harm him, with Minato observing all this.
One popular theme is Minato getting to know Naruto in the afterlife. Since Minato died when Naruto was a baby, fanfictions often explore their relationship in a spiritual realm.
One possible theme is family love. The act of Minato tickling Naruto shows the strong bond between father and son, emphasizing the love and care within a family. Another theme could be innocence. It portrays the simple joys of childhood, like the innocent laughter that comes from being tickled by a parent.
One possible reason could be for Naruto's protection. Maybe Minato knew of some great danger that was coming for Naruto and he thought that banishing him would keep him out of harm's way. Another reason might be related to some prophecy or hidden power within Naruto that Minato feared could be misused if Naruto stayed in the village.
There are many out there. A really good one might focus on the emotional reactions of Team Minato. For example, Minato might be proud of Naruto's strength and how he overcomes Pain. Kakashi could be in awe at Naruto's new techniques. Their reactions can enhance the overall viewing experience in the fanfiction.
One reason could be guilt. Since Minato wasn't there for Naruto when he was growing up in the original story, in the fanfiction, he might be overcompensating for that lost time. He feels like he has to make up for all those years he wasn't around to protect his son.
On a more personal level, they could face internal guilt. As Naruto grows up and achieves great things on his own despite their neglect, Minato and Kushina may realize what they've missed out on. This realization could cause them a great deal of internal turmoil and regret for not being there for their son when he needed them.
Power and responsibility are big themes too. Having the power to watch the future comes with the responsibility of what to do with that knowledge. Some fanfictions explore how Minato uses this power for the greater good, while others show the temptations he faces to use it for personal gain, which adds a layer of moral complexity to the stories.
One possible plotline could be that Naruto gets trapped in Minato's memories and has to find a way out. While inside, he relives important moments from Minato's life and gains new powers or knowledge.
One possible reason could be fear. If Naruto was 'godlike' in this fanfiction, his power might be uncontrollable and Minato, as Hokage, might feel it's a threat to the village. He could think that Naruto's power could attract too many dangerous enemies or cause destruction accidentally.