One common theme is redemption. Since they both have a lot of regrets in their original timeline, time travel gives them a chance to fix things, like saving their friends or preventing the destruction of the village.
A new character could be introduced as the antagonist. Maybe someone who has also time - traveled and has their own agenda for the past. This character could be trying to preserve the original timeline for some reason, or they could be trying to create an even worse future. They would oppose Obito and Kakashi at every turn, creating a lot of conflict and drama in the fanfiction.
One common theme is redemption. Since they go back in time, both Obito and Kakashi often try to atone for their past mistakes. For example, Obito might try to prevent the events that led him to become evil in the first place.
One idea could be that Obito and Kakashi are sent back to their childhood days. Obito then tries to prevent certain tragedies that happened in their past, like the death of his comrades. He might also try to change Kakashi's cold - hearted nature that developed over time. This could lead to a whole new set of relationships and events in the Naruto world.
There's also 'Time's Redemption'. This fanfiction has a unique take on time travel. Kakashi and Obito are sent back together. They have to work together to change the fate of the Hidden Leaf. The story delves deep into their relationship, exploring how they understand each other better through this time - traveling adventure.
One idea could be that Kakashi travels back to the moment right before Obito's 'death'. He uses his knowledge of future events to prevent the cave from collapsing on Obito. Then, together they are able to rescue Rin more effectively and change the whole tragic course of events.
One great 'Obito and Kakashi time travel fanfiction' is 'Time's Redemption'. In this story, Obito and Kakashi are sent back in time and have to deal with the knowledge they now possess about the future. They try to prevent certain tragedies from occurring. It has some really interesting character interactions and explores their relationship in a new light.
One great Kakashi x Obito fanfiction is 'The Bonds We Share'. It delves deep into their relationship, exploring how their past experiences shape their interactions in a post - war Konoha. It shows their growth and how they come to understand each other on a deeper level.
One great 'Naruto x Obito Time Travel Fanfiction' is 'A New Chance'. It shows Obito traveling back in time and trying to change the course of events in the Naruto world. He teams up with Naruto at a younger age and they start to rewrite history, making some really interesting changes to the story we know.
Their relationships would become much stronger. Kakashi would no longer have to bear the guilt of Obito's 'death' and Rin's loss. Obito would be extremely grateful to Kakashi for saving his life and would likely view him as an even greater friend and ally. Rin would also be happy to have both of them by her side, and they could form a very tight - knit team.