Some fanfictions may have Itachi time - traveling to a different dimension where things are different in the Naruto universe. For example, he could end up in a world where the Akatsuki are the good guys and the Hidden Villages are the antagonists. Itachi would then have to figure out how to survive and adapt in this new environment. He might also try to find a way to bring some of the positive aspects of this new world back to his own time and place to change the fate of his clan and the village.
One interesting idea could be Itachi traveling back in time to prevent the Uchiha massacre. He could use his knowledge of future events to find a way to resolve the conflict between the Uchiha clan and the village without bloodshed. Another idea might be Itachi traveling forward in time to see the consequences of his actions and how his younger brother Sasuke has turned out. He could then try to guide Sasuke in a different direction from the future he witnessed.
One idea could be that Naruko travels back in time and accidentally disrupts Itachi's life before the Uchiha massacre. This could lead to her trying to prevent the tragedy while also dealing with the complex web of Uchiha politics. Another plot could be Itachi traveling to the future and meeting an older, more powerful Naruko, and together they have to face a new threat that's related to both their pasts.
One idea could be that during their time travel, Naruto and Itachi end up in a time when the Uchiha clan was not massacred yet. Itachi has to face his past self and Naruto tries to find a way to prevent the tragedy without changing too much of the future. Another plot could be that they travel to a future where everything is in chaos and they have to use their combined skills and new - found relationship to set things right.
Another plot could be that when they travel back, they end up in a different timeline where the ninja world is in an even more chaotic state. Fem Naruto and Itachi have to use their skills and new - found friendship to restore order. Itachi might teach fem Naruto some of his more advanced Uchiha techniques, which she then uses to great effect.
One popular plot idea could be that Sakura and Itachi travel back to a crucial moment in the ninja world's history. For example, they might go back to the time when the Uchiha clan was on the verge of being massacred. Sakura, with her medical skills and modern knowledge, could try to find a non - violent solution to the Uchiha - Konoha conflict. Itachi, on the other hand, would have the chance to relive that moment and perhaps change the fate of his clan. Another idea is that they travel to the future. There, they see the consequences of the actions in their own time and try to go back and correct things in their present. This could involve seeing a destroyed Konoha and working together to prevent it.
One idea could be a story where Tracer accidentally travels back to the Omnic Crisis era. She could meet the younger versions of the original Overwatch founders and try to help them in ways that might change the future of Overwatch. Another could be Reinhardt going back in time to his early days as a Crusader and having to relive some of his toughest battles with the knowledge he has now.
One interesting idea could be Tsuna going back in time to prevent certain tragedies in his family's past. This would change the whole dynamic of the Vongola family in the present.
One interesting idea could be the characters going back in time to prevent certain tragedies. For example, they might try to stop the deaths of some important characters. This could change the whole course of the story and create new relationships and plot twists.
One idea could be Atsushi traveling back to his own past to prevent certain tragedies from happening in his life. He might change the way he was treated in the orphanage or avoid some of the early hardships. Another idea is Atsushi traveling to a future where he has become a much more powerful and respected figure, and he has to learn from that future self to come back and save his present world. And a third idea could be Atsushi getting accidentally sent to a different time period in Yokohama's history and having to navigate through that era while also trying to find a way back to his own time.
In a Ninjago time travel fanfiction, the ninjas could be sent forward in time to a post - apocalyptic version of Ninjago. They would have to figure out what went wrong and then travel back to their own time to prevent it from happening. This could involve battles with future versions of their enemies who have evolved into even more dangerous foes.
One interesting idea could be changing the outcome of key battles. For example, if a character travels back in time, they might be able to prevent a certain loss in a fight, which could then change the entire course of the story. Another idea could be related to relationships. A character might go back in time to fix a broken relationship or to start a relationship earlier than it originally happened in the ff8 universe.