It could be that Naruto left after the war to fulfill a promise he made during the heat of battle. Perhaps he promised to visit a far - off land or help a group of people who were affected by the war but were overlooked. His departure then is a self - imposed mission to right the wrongs and bring hope to those in need. Along the way, he'll face challenges and grow even more as a person and a ninja.
Maybe in this fanfic, Naruto left because he felt that he no longer fit in the post - war Hidden Leaf. His friends have all started to build their own lives, and he feels like an outsider. So he sets off on a journey to discover his own identity outside of being the hero of the war. He might encounter new enemies and allies, and form a whole new life for himself far from his homeland.
One possible plot could be Naruto feeling a sense of disillusionment after the war. He might have seen so much destruction and death that he decides to leave in search of a true and lasting peace away from the Hidden Leaf. He could be on a journey to find other ways to maintain peace among the ninja clans without the use of force or political power plays.
In one possibility, Naruto might leave the village to seek greater power on his own. He could feel that the village's teachings and training methods are limited. So, he embarks on a journey across different lands, meeting new shinobi and learning unique jutsu that the village doesn't offer. This could lead to him coming back much stronger, but also with a different perspective on the village and its values.
In such a fanfiction, one possible plot could be that the villages Naruto protected during the war start to fear his power. They might see him as a threat now that the common enemy is gone. So, they conspire against him, leading to his feeling of betrayal.
Perhaps Naruto and Yugao go on a mission outside the village after the war. They encounter some remnants of the enemy forces who are still causing trouble. Along the way, they bond over their shared love for the village and their determination to keep it safe. They might also discover new jutsu or abilities during this mission.
The fanfic could also focus on the personal lives of the characters. Naruto might finally have time to focus on his relationship with Hinata. There could be stories about how they build their family, and how Naruto balances his role as a family man with his duties as a hero of the ninja world. At the same time, other characters like Sasuke could also be exploring their new identities in a post - war world, trying to find their place and purpose.
One possible plot could be Naruto and Hinata starting to build a family. They might face challenges in adjusting to a normal life after the chaos of war. Naruto could struggle with PTSD from the battles and Hinata would be there to support him. They would also be involved in rebuilding the village together, with Hinata using her skills to help the wounded and Naruto using his leadership to inspire the villagers.
Well, one possibility could be the rebuilding of the ninja villages. After the war, there would be a lot of destruction to repair. Maybe Naruto and his friends would take on leadership roles in this rebuilding process.
Perhaps Naruto forms new alliances in this 'naruto after the war crossover fanfiction'. He might team up with characters from other fictional universes who got involved because of the crossovers. They could work together to restore peace not just in his world but also in the worlds that have been connected through the crossovers.
Maybe in the fanfic, Naruto and Hinata work together to rebuild the village. They use their unique skills and influence. Naruto, with his leadership skills and powerful jutsu, and Hinata, with her Byakugan and knowledge of the Hyuga clan's techniques. Their teamwork could strengthen their bond even more. And also, they might encounter some old enemies who are trying to take advantage of the post - war confusion, and they have to fight side by side again.
Maybe Naruto is betrayed by someone within the village who sets him up to look like he's dead. Left for dead, he's found by a hermit who teaches him new and powerful jutsu. With his new skills, he plans to return to the village to expose the traitor and prove his worth once again.
One possible storyline could be Percy struggling with PTSD. He might have nightmares about the war and find it hard to reintegrate into normal life. For example, he could avoid social situations because the noise and crowds remind him of the chaos of the battlefield.