Another plot might be that they travel to the early days of the Hidden Leaf Village. There, they help the first Hokage build the village. They could introduce some new ideas from their own time, like different training methods for the ninja academy students, which would enhance the strength of the village from the very beginning.
A possible plot is that Naruto and Naruko are sent back to a time when a great war is about to break out. They have to figure out how to stop the war before it starts. They might have to deal with powerful enemies who are much stronger than they were in their original time. But with their combined efforts and the knowledge of future events, they strive to bring peace to the ninja world.
One interesting plot could be Naruto and Naruko traveling back to the time when the Uchiha clan was about to be massacred. They could try to prevent it, which would change the whole future of the ninja world. Maybe they use their future knowledge and skills to stop Itachi from carrying out the order.
One interesting plot could be Naruto time - traveling back to his childhood and meeting a female version of himself, Naruko. They could team up to change the future of the Hidden Leaf Village. Maybe they work together to prevent certain tragedies that happened in the original timeline.
She could travel to a dimension where all the ninja villages are united. Naruko would be amazed at the peace and cooperation and might try to bring this concept back to her own dimension. It would be a story about her learning from this utopian - like place.
In some 'naruto and naruko harem fanfiction', there might be a plot where Naruto has to choose between Naruko and other potential love interests. This creates a complex web of relationships and emotions as he tries to figure out his true feelings. It also shows how the harem concept affects the characters' growth and decision - making.
One possible plot could be Naruto and Naruko being banished unjustly and then having to prove their worth outside the village. They might encounter new allies and enemies, and develop new jutsu in the process.
Well, in some fanfictions, Naruto and Tsunade time travel and end up changing the power dynamics in the ninja world. Maybe they help a small village become a major power by introducing modern ninja concepts. Also, they could time travel to a period when the Akatsuki was first formed and try to disband it before it causes too much chaos.
One interesting plot could be that they travel back to their childhood days and try to prevent some of the tragedies that happened later. For example, Sasuke might try to stop the Uchiha clan massacre from the start. Another plot could be that they are sent to a time when the ninja world was first being formed and they have to use their modern - day skills to survive and shape the new world.
One interesting plot could be Sakura traveling back in time and using her modern medical knowledge to save characters who previously died in the original Naruto story. For example, she might be able to prevent the death of Minato, which could have a huge impact on the entire Naruto world. Another plot could be Sakura trying to change Naruto's childhood by being there for him earlier and preventing some of the bullying he endured. This could lead to a different Naruto, perhaps more confident from the start.
One interesting plot could be Minato traveling back to prevent the Nine - Tails attack on Konoha. He could use his knowledge of future events to stop Orochimaru from influencing the situation that led to the attack. Another plot might be Minato traveling to a time when the Uchiha clan was on the verge of the coup. With his wisdom and power, he could try to find a peaceful solution and prevent the massacre. Also, he could travel to the time of the First Hokage to learn more about the origin of the ninja world and bring back that knowledge to improve Konoha in his own time.
One interesting plot could be the main character traveling back in time and preventing the initial capture of the bijuus. This would completely change the power dynamics in the Naruto world. Another could be a character using time travel to team up with past jinchuriki to fight a new, greater threat.
One interesting plot could be that Naruto and Tsunade travel back in time to the founding of Konoha. They could use their modern - day knowledge and skills to change certain events for the better. For example, Naruto might be able to prevent some of the early conflicts within the village using his understanding of unity. Tsunade could use her medical skills to save lives that were lost in the past, which in turn could have a huge impact on the future of Konoha.