One possible plotline could be that they go back in time to prevent a major disaster that happened in their own time. For example, they might try to stop the destruction of the village. Another could be that they are sent back to change the course of their own relationship. Maybe in their original timeline, they had some misunderstandings, and going back gives them a chance to fix things. It could also be that they are sent back to learn something specific, like a long - lost ninja technique that only existed in the past.
In some Sakura x Naruto time travel fanfiction, the plot could revolve around them going back in time and accidentally changing the future in unexpected ways. For instance, they might save a character who was supposed to die, which then has a ripple effect on the whole timeline. This leads to them having to find a way to fix the timeline while also dealing with their own personal growth. They might also discover secrets about their own families or the origin of ninja techniques that were lost in their own time, which adds a whole new layer of mystery and adventure to the story.
Maybe Naruto travels back in time to a point where Anko is in a difficult situation. He uses his sharinnegan abilities to help her out, and during this process, they start to develop feelings for each other that were not present in the original timeline. And as they try to return to their own time, they face various challenges that test their relationship and their new - found powers.
One possible plotline could be that Naruto accidentally travels back in time and lands right in front of Tsunade when she was at a crucial point in her life, like just after the death of her loved ones. Naruto, with his future knowledge, helps her cope and in the process, they grow closer. Another plotline could be that Tsunade is sent to the future where she meets an older and more mature Naruto. They initially clash due to their different outlooks from different times but then gradually fall in love as they understand each other better.
One possible plotline could be that they discover their relation and then Naruto becomes overprotective of Sakura. Another could be that they have to face some family secrets together. Maybe there's a hidden power in their family that only they can unlock as siblings.
Another plot could be that they are sent forward in time. In the future, the ninja world has become very different, maybe more technologically advanced or in a state of peace. Sasori, who is used to a world of conflict and his puppet - making, would be out of place. Sakura, being more adaptable, tries to help him adjust. They might also discover that their actions in the past had unforeseen consequences that led to this future state, and they have to decide whether to try and change it back or let it be.
There's 'Time - Twisted Destiny' too. In this fanfiction, when Naruto and Sakura travel back in time, they find themselves in a situation where they have to be very careful not to disrupt the timeline too much. Their interactions with younger versions of their friends are really fun to read. The story also delves deep into Sakura's growth as she tries to use her medical skills in a more impactful way in the past.
Perhaps they time - travel to a time when the ninja world was at peace. Naruto, who is used to a world full of conflict, is initially out of place. Mikoto helps him adjust. They start to fall in love during their adventures in this idyllic past. They might discover secrets about the origins of certain jutsus or ninja clans that were lost in Naruto's time. Their relationship could be a source of both strength and confusion as they navigate a world that is both familiar and strange to them.
Another plot could be that they travel to a future time where Konoha is in ruins. They have to figure out what went wrong and try to change the events that led to this destruction. Shikamaru could use his intelligence to analyze the situation, while Naruto uses his determination and strength to fight any threats they encounter. Maybe they find out that an old enemy has returned in a new form and they must stop it.
Another plotline could be that Naruto travels to the future in his fox form. In the future, Konoha is in ruins. He then has to figure out what led to this disaster using his fox - enhanced intuition and time - travel knowledge. He could then go back to his own time and take steps to prevent the events that led to the future's destruction. This would involve him facing new enemies and making tough decisions along the way.
One possible plotline could be that Henrietta, with her own set of skills and experiences, somehow gets transported to the Naruto universe. She might have to adapt to the ninja world, and Naruto could help her in this process while also learning from her in return.
One possible plotline could be that Naruto somehow gets transported to the world of satellizer. There, he might use his ninja skills to help satellizer in her battles or against her enemies.