Well, one possible plot could be that Sakura goes back in time and uses her medical ninjutsu knowledge to prevent some major disasters in the past. For example, she might stop a plague that wiped out a large part of the village in the past. This would change the course of history and make her a hero in a different way than she was in her original timeline.
In a 'sakura haruno goes back in time fanfiction', she could go back to the time when the ninja clans were at war more often. Sakura, with her knowledge of future events and her combat skills, could try to broker peace between the clans. She might use her medical skills to treat the wounded from both sides, showing them that there is a better way than constant fighting. This would not only change the past but also have a ripple effect on the future she came from.
Sakura might meet the founders of the village. For example, she could meet Hashirama Senju. He was a powerful and visionary leader. Meeting him could give Sakura insights into the true origins of the village and how to better protect it. She could also learn some of the ancient ninja techniques from him.
Well, it could be about Sakura being discovered by a music producer while she's just singing for fun in a park. Then she gets trained and has to deal with the pressure of becoming a star.
In a fanfiction plot, balloons might be used as a form of communication during a war. Sakura and her team are cut off from the main forces. They discover that by using balloons with special markings and messages, they can send signals to their allies. This becomes a crucial part of their survival and the overall war effort, with Sakura taking the lead in this unique form of communication.
The plot might involve Sakura Haruno getting Saiyan - like powers through some sort of magical or scientific accident in her Naruto world. Since she's a fan, she quickly adapts to these new powers. She then uses them to protect her village in a new and unexpected way. For example, she could have super strength and speed like the Saiyans, and she uses these to take on stronger opponents that the regular ninja techniques couldn't handle.
She might be an angel in disguise among the ninjas. Sakura could use her angelic abilities secretly to help the village. For instance, she could make the crops grow better in the fields around the village by using her angelic magic. When a great danger threatens the village, she reveals her true form and uses her powers to fight off the enemy. Her friends are surprised but quickly accept her new identity.
One possible plot could be that Sakura discovers her immortality after a strange encounter or experiment gone wrong. She then has to deal with seeing all her friends die over time while she remains, and she tries to find a way to either reverse it or make the best of her eternal life.
One possible plot could be that Kagome goes back in time and tries to change a major event in the past. For example, she might try to prevent a big battle that had a lot of casualties. She could use her modern knowledge and skills to her advantage in the past, like using first - aid knowledge to save lives.
Well, one possibility could be that Kurama goes back to a time when he was first captured by the shinobi. He might try to change things so that he doesn't end up in their hands initially. He could use his knowledge of the future to outwit his captors and escape much earlier, and perhaps even start a new life in a different part of the world.
Well, in the fanfiction, Itachi could go back in time and decide to train his younger self more rigorously. This would not only make him stronger but also change the way he approaches his future tasks. He might also try to influence Sasuke at an earlier age, guiding him in a different direction than in the original timeline. And he could befriend some characters earlier to build a stronger support network for the Uchiha clan.
Maybe Yusei goes back in time to prevent a great disaster that happened in the past. He could use his knowledge from the future to change certain events and save lives.