A possible plot could involve Minato traveling to a future where the concept of chakra has evolved. He has to adapt to this new form of chakra usage. Along the way, he meets his own descendants and realizes the long - lasting impact of his actions in the past. He also tries to find a way back to his own time while making a mark in this future world.
He could meet his future descendants. Maybe a great - grandson who has inherited some of his speed but also has unique abilities of the future.
In this fanfiction, Sakura might be on a mission to change the past in order to save someone important in her present. Minato could initially be suspicious of her but then come to trust her as they face common enemies. They could end up influencing each other's future and past in unexpected ways, like Sakura teaching Minato some basic first - aid knowledge that he then passes on, which changes the course of some future battles.
Well, one possibility could be that they see a future where the village is in ruins. They then start to analyze what led to such a disaster and try to find ways in their present to prevent it. Maybe they see a powerful enemy they've never faced before and start devising strategies to counter it.
Maybe Future Gohan travels back to a time before he was born. He could then try to influence his father, Goku, to be more prepared for the future threats. He might also give some advice to Piccolo on training young Gohan. This would create a butterfly effect, with many changes in the relationships and power levels of the characters.
One possible plot could be that Kenshin is sent to a future where his past actions have had far - reaching consequences. Maybe his vow to not kill has inspired a new generation of warriors, and he has to adapt to a world where his skills are both revered and feared in new ways.
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.
One possible plot could be that the Marauders use a time - turning device by accident and end up in the future. They might be shocked by the advanced technology and different social norms. They could also meet their descendants or versions of themselves that are very different from what they expected.
A cool plot idea could be Minato traveling back to his own childhood. He could then use his future knowledge to train himself more effectively, making himself an even more powerful shinobi at a younger age. This would have a huge impact on the future of the Leaf Village as he would be able to better protect it earlier. He might also be able to prevent some of the early tragedies that happened in the village.
Well, a frequent plot twist is when the time travel affects the relationships within Team Minato. Maybe they go back in time and realize they were wrong about someone. Or they accidentally change something in the past that makes one of their relationships turn sour. Also, they could find out that someone they thought was an enemy in their original time was actually a friend in the past, which is a huge revelation and changes the whole dynamic of the story.
One idea could be that Minato and Kushina travel back to the time when the Hidden Leaf Village was first founded. They could use their modern - day knowledge and skills to help shape the village in new ways, like introducing new jutsu training methods. Another could be that they go back to a time when a great war was about to start and they use their powers to prevent it, thus changing the future of the ninja world.