One interesting plotline could be Naruto and Sakura traveling back in time to their early days at the academy. They could use their future knowledge to change certain events, like preventing some of the early hardships they faced. For example, Naruto might stop himself from pulling that first prank that got him in so much trouble, and Sakura could avoid some of her early insecurities.
Another plotline might involve them traveling back to a crucial moment in the ninja war. They could change the outcome of a battle, perhaps by warning their past selves about an ambush or a powerful enemy's weakness. This would not only alter the course of the war but also their relationships with other characters.
A possible plotline could involve Naruto's return after having some sort of spiritual awakening. He returns to the village, and Sakura is the first person he seeks out. Their interactions then lead to a deeper understanding of their feelings for each other. This could involve flashbacks to their past experiences together and how those have shaped their current relationship.
One interesting plotline could be that Harry and Luna travel back in time to prevent the death of Sirius Black. They might use their knowledge of future events to outwit Voldemort's minions and change the course of that tragic event.
One interesting plotline could be Naruto and Kurenai traveling back in time to the founding of Konoha. They could use their modern - day knowledge and skills to influence the village's early development in positive ways, like introducing new training techniques.
One interesting plotline could be Harry and Draco accidentally traveling back to the time when their parents were at Hogwarts. They might see how their parents interacted and how the whole wizarding world was different then. Another could be them traveling to a future version of Hogwarts and seeing the changes in magic education and the social structure among witches and wizards.
A possible plotline is Naruto going back in time and meeting his parents when they were young. He could influence their lives in a positive way, perhaps by helping them become even stronger ninjas. This could also lead to changes in how Naruto was raised and his own development as a ninja.
Another plotline could involve a villain traveling back in time to use the Juubi's power in a different era. They could manipulate events to their advantage, like changing the outcome of important battles or influencing key characters to side with them. This would force the heroes to also time - travel to stop the villain's plan.
Perhaps Naruto travels back to the time when the Akatsuki was first formed. He tries to use his charm and modern - day ninja knowledge to persuade them to become a comedy troupe instead. He shows them how to do funny dance moves and tells them corny jokes. The Akatsuki members are initially confused but then start to find the whole idea strangely appealing, leading to a series of comical interactions.
One interesting plotline could be Team 7 going back in time to prevent certain tragedies. For example, they could stop the Uchiha massacre. This would completely change the future of the Naruto world. Another plotline might involve them using their future knowledge to train more effectively in the past, and perhaps learn new jutsu earlier. They could also use their time - traveling ability to figure out the secrets of some long - lost clans or techniques.
One interesting plotline could be Naruto and Shikamaru traveling back to the time of the founding of Konoha. They could use their modern - day knowledge and skills to influence the village's formation in a positive way, like introducing new jutsu training methods. Another could be them going back to key battles in the past to change the outcome and save lives that were lost. Maybe they prevent the death of a beloved character, which then has a ripple effect on the future of the ninja world.
One interesting plotline could be Naruto and his friends traveling back in time to prevent a great tragedy that happened in their world. For example, they might go back to stop the destruction of a village.