Another plot could involve Minato traveling back in time and meeting his parents. He could learn more about his family's past and secrets that were lost over time. This could lead to him unlocking new powers or abilities that were somehow related to his family heritage. He might also be able to use this new - found knowledge to better protect the village in his original time.
Definitely Kushina should be included. She was an important part of Minato's life. Their relationship could be explored in new ways with the time travel element. For example, Minato could try to protect her even better from the start. Jiraiya is also a great choice. Minato could learn more from him earlier or even teach Jiraiya some of his future knowledge.
To develop Minato's character, focus on his growth as a ninja. Show how his skills progress from being a young prodigy to a powerful Hokage. For Kushina, emphasize her strong - willed nature and her Uzumaki heritage. Let her use her unique abilities more often. Also, show their relationship growth. Minato could become more confident in his relationship with Kushina as he matures, and Kushina could learn to be more patient with Minato's sometimes - over - serious nature.
One plot idea could be their first meeting. Maybe Minato saves Kushina from some bullies in the ninja academy. It could show how their initial attraction starts. Another idea is a mission they go on together. They face challenges and have to rely on each other's skills, which deepens their bond. A third plot could be about them preparing for their wedding. They deal with the stress of family expectations and also the joy of starting a new life together.
One interesting plot twist could be that Minato travels back to a time when the Hidden Leaf Village is on the verge of a civil war. He uses his future knowledge to prevent it, changing the entire future of the village. Another could be that he travels to a time where his parents are still alive and has to deal with the complex emotions of seeing them again.
Minato would likely be extremely shocked. Naruto is his son, and the idea of Naruto attacking him would be completely unexpected. He would probably try to talk to Naruto first, to find out what is wrong and why he is being attacked.
One of the main similarities is their self - sacrifice. Minato sacrificed himself to save the village and his son. Naruto has also shown that he is willing to put himself in harm's way for the greater good. He's always the first to jump into a dangerous situation if it means protecting those he loves. Another aspect is their leadership qualities. Minato was a great leader as Hokage, and Naruto has developed into a great leader as well, inspiring those around him.
The emotional bond would be stronger. Naruto wouldn't have to face the pain of growing up without a father. Minato could be there to cheer him on during his training and be a source of comfort when Naruto faced difficulties, like when he was bullied as a child. He could also help Naruto better control the Nine - Tails' power from the start.
Well, Minato might constantly be by Naruto's side in the fanfiction. He could prevent Naruto from taking on any dangerous missions, even if Naruto is capable. For example, he may interfere when Naruto tries to join a risky battle against a powerful enemy, saying it's too dangerous for him.