A great plot for 'fo4 after story fanfiction' would be the emergence of a new faction. This faction could have different ideals from the existing ones. They might believe in a more technological - based society compared to the more agrarian - focused settlements. The Sole Survivor would then have to decide whether to side with this new faction, oppose it, or try to find a middle ground. This would also lead to a lot of political intrigue and power struggles within the Commonwealth.
In a Inuyasha After Story fanfiction, we could see a story where Inuyasha and Kagome's relationship hits a rough patch. Maybe Kagome misses her modern - day life a bit too much and Inuyasha doesn't understand. Meanwhile, there are strange disappearances in the forest near their village. The gang discovers that a new type of demon is luring people and demons into a different dimension. They have to figure out how to stop it. Also, Sango and Miroku's kids could play an important role in helping to solve the mystery, with their own unique skills they've learned from their parents.
A third idea is to create a story where the characters from Angel Beats After Story get mixed up with characters from another anime world. This would bring a whole new dynamic as they have to adjust to different rules and cultures while still holding on to their own identities and goals from the Angel Beats universe. It could be a really fun and unique fanfiction concept.
The Sole Survivor is an obvious choice. Their journey doesn't have to end with the main story. You can explore their further adventures and how they adapt to the post - apocalyptic world in new ways. Piper is also a great character. You could write about her journalistic pursuits in the new era, like uncovering secrets that could change the future of the settlements.
One idea could be exploring the characters' post - war traumas. For example, how they deal with the memories of the battles and losses. Another plot could focus on the rebuilding of their world. Maybe they have to establish new relationships with former enemies. Also, a plot about the discovery of hidden secrets during the war that now come to light and affect the post - war situation would be interesting.
Perhaps in this 'after the giant war fanfiction', it could explore the political changes in the demigod world. With the major threat gone, different cabins might vie for more power or influence in the camps. There could be new alliances formed and old ones broken. Some characters might feel left out or marginalized in this new power struggle. The story could follow a character who is trying to bring unity back to the camps while also dealing with their own personal issues from the war.
One idea could be Gaa and Hinata working together to rebuild their village. They could use their skills and knowledge to improve the living conditions for everyone. For example, Hinata could use her Byakugan to find underground water sources for new wells, while Gaa could use his strength to help with the construction of new houses.
One idea could be Naruto focusing on rebuilding Konoha and establishing new alliances. He might use his newfound influence after defeating Pain to promote peace among the hidden villages. For example, he could start an exchange program for young ninjas to understand each other better.
In this type of fanfiction, there could be a plot where a strange disease starts affecting ninjas' chakra systems. Naruto has to lead the search for a cure, which takes him on a journey across the ninja world. Along the way, he discovers secrets about the origin of chakra that were long forgotten. This could also lead to some interesting character development for other supporting characters as they face this new crisis together.
One idea could be exploring how the districts rebuild and change their relationships with each other. Another could be following the main characters as they deal with the psychological aftermath of the games.
In 'Harry after the war fanfiction', a great plot could be Harry using his fame and influence to start a magical charity. This charity could help those who were affected by the war, like orphans and those who lost their homes. He could also travel around the world to different wizarding communities, sharing his experiences and learning about their unique magical cultures, which would not only be a journey of self - discovery for him but also help in uniting the global wizarding community.