One common theme is redemption. Sasuke, for example, might get a chance to correct his past mistakes during the time travel. Another theme is the exploration of their relationship. Since Naruto and Sasuke have a complex bond, time travel can show how it could have been different or how it's strengthened. Also, changing the fate of the ninja world is a big theme. They might try to prevent certain disasters or change the course of history.
One popular sasunaru hokage time travel fanfiction is 'A Time - Twisted Tale'. It takes Naruto and Sasuke back in time and they have to navigate the past while dealing with their complex relationship. Another great one is 'Time - Warped Bonds' which focuses on how their time - traveling affects the future of the ninja world.
A great sasunaru time travel fanfiction could involve both of them traveling to a different time period, perhaps during the era of the Sage of Six Paths. There, they learn about their past reincarnations and the origin of their connection. This gives them a deeper understanding of their bond and also allows them to gain new powers or knowledge that they bring back to their own time.
One common theme is self - discovery. As they travel through time, both Sasuke and Naruto often discover new aspects of themselves and how they've changed since getting married. Another theme is the test of their relationship. Time travel throws various challenges at their marriage, like different cultural norms in different eras or meeting their past selves.
One great 'Naruto Hokage Time Travel Fanfiction' is 'A New Beginning'. It has an interesting plot where Naruto travels back in time and uses his knowledge to change many things in the ninja world. The character development is really well - done, especially how Naruto becomes more cautious and strategic with his second chance at life.
Another possibility is Naruto traveling back to his own childhood days. He could mentor his younger self, teaching him advanced jutsu and wisdom he's gained over the years. This would make his younger self much stronger much earlier, and might also change how he interacts with Sasuke. For example, he could help his younger self better understand Sasuke's pain and prevent some of their earlier conflicts.
Often, in sasunaru time travel fanfiction, the time travel creates a situation where they have to rely on each other more. For example, if Naruto travels back in time and Sasuke doesn't trust him at first, but as they face challenges together, their relationship grows. They start to understand each other on a deeper level.
There's also 'Sasunaru: Time - Bound Hearts'. In this fanfiction, their married life gets disrupted by a time travel incident. It's interesting to see how they deal with the changes in their relationship and the new situations they encounter in the past or future. It has a lot of emotional moments that really draw you in.
One common theme is redemption. Since Kakashi can go back in time, he often tries to make up for past mistakes or prevent tragedies that occurred in the original timeline. For example, he might try to save a character who died before. Another theme is the changing of fates. He can change the destiny of not only himself but also of his friends and the whole village. He can use his knowledge of future events to better prepare for threats.
Another idea for this fanfiction is that Naruto's time travel as the 6th Hokage could lead to him meeting his predecessors in a different way. He could learn new jutsu or leadership skills directly from them. For instance, he could have in - depth conversations with the 1st Hokage, Hashirama, about how to better manage the relationships between different ninja clans and build a stronger, more united village.