Hikaru no go back in time fanfiction: What are some interesting plot ideas?

One idea could be a crossover with another popular anime like Naruto. Hikaru could find himself in the Hidden Leaf Village and have to use his Go skills in a unique way to solve a problem there. Maybe he has to play a game of Go against an enemy ninja where the outcome determines the fate of the village.

Regarding his family, Hikaru could understand their support for his Go journey better. He might go back in time and be more open with them about his passion for Go. This could lead to his family being more involved in his Go - related activities, like attending more of his tournaments and providing more emotional support. Maybe his family could also play a role in promoting Go in the community because of Hikaru's influence.

Maybe Goku goes back to the time when Planet Vegeta was still intact. He could try to prevent Frieza from destroying it. This would change the entire Saiyan race's fate and might create a whole new timeline with a powerful Saiyan empire.

One idea could be that Percy and Artemis are sent back to the time of the Titans' rule. They have to work together secretly to gather allies among the minor gods and demigods who are oppressed. Another could be they go back to the founding of Camp Half - Blood and have to make sure the important events occur as they should while also dealing with a threat that could change the future of the camp. A third plot idea might be that they are thrown back to a time when a powerful artifact was first created, and they need to prevent it from falling into the wrong hands to safeguard the future of the demigod world.

One idea could be that the 501st goes back in time to the Clone Wars' early days. They could use their knowledge of future battles to change the course of the war for the better, perhaps by preventing certain strategic mistakes. For example, they might stop a Separatist ambush that was originally successful.

One plot idea could be that Ino goes back in time to the founding of Konoha. She could use her knowledge of the future to prevent some of the early tragedies that befell the village. Another idea is that she goes back to her own childhood and tries to change certain events that led to insecurities in her later life. For example, she might try to befriend Sakura earlier and avoid the rivalry that developed between them.

One idea could be that the vanguard goes back to a crucial moment in history and has to prevent a major disaster that would change the future in a negative way. For example, they could stop a powerful weapon from being created too early.

One idea could be that Merlin and Elizabeth go back in time to Camelot's golden age. They could use their modern knowledge to solve ancient problems. For example, they might introduce new medical techniques that save lives. Another plot could involve them trying to prevent a major disaster in Camelot's past that they know about from history books. They might also have to deal with the cultural shock of living in a different time period.

Pan could also go back in time to meet his younger self. He could give his younger self advice on how to become stronger and more skilled. However, this might have unforeseen consequences as changing his own past could disrupt the balance of his life in the present. He might find that some of the relationships he had in the present are now completely different because of the changes he made in the past.

One idea could be that the demigods are sent back to prevent a great disaster that was actually caused by one of their own kind in the past. They have to figure out who it was and stop it without changing too much of the future.