A great plot idea would be to have a time - travel aspect. Some young wizard or witch accidentally goes back in time to the days just after the final battle. They see how the wizarding world was rebuilding and learn valuable lessons from the past. Meanwhile, the present - day characters notice strange things happening and start to investigate. This could lead to a whole new adventure that involves both the past and present of the Harry Potter universe.
In an 'Epilogue Harry Potter fanfiction', you might consider a story where Harry Potter discovers a long - hidden secret about Hogwarts that was overlooked during his time as a student. This could lead to a new adventure with his friends. You could also explore the idea of the magical creatures in the wizarding world becoming more involved in the human - wizard relations. For instance, the centaurs sharing their ancient wisdom with the wizards. Additionally, a fanfiction could be centered around the Muggle - born wizards and witches helping to bridge the gap between the Muggle and wizarding worlds even more.
One interesting idea could be exploring the further adventures of the next generation at Hogwarts. Maybe they discover a long - lost magic that was forgotten. Another idea might be delving deeper into the relationships that were just hinted at in the original epilogue, like how Albus Severus Potter really gets along with his Slytherin friends.
Some fanfics might focus on the idea of time - travel within the 'harry potter' universe in the context of the epilogue. Imagine if one of the next - generation characters accidentally travels back in time and meets the younger versions of their parents. This could lead to all sorts of comical and heart - warming moments. It could also explore how this time - travel affects the future and whether they are able to return to their own time without causing any major disruptions to the timeline.
One interesting fanfic could be about the next generation at Hogwarts facing a new dark threat. Maybe they discover a hidden spell that was thought to be lost, and they have to figure out how to use it to defeat the enemy.
In the 'Harry Potter after the epilogue fanfiction', perhaps there are changes in the Hogwarts curriculum. They might introduce new magical subjects that were previously undiscovered. Also, the relationships between the different houses could evolve. For example, Slytherin and Gryffindor could form an unexpected alliance to deal with a common problem in the wizarding world.
One idea could be that Harry and his friends use their magic to help rebuild the wizarding world even more beautifully. They could create new spells for healing and growth. For example, Hermione might develop a spell to make damaged magical creatures healthy again in an instant. Another could be that Harry and Ginny's family expands with more magical children, each with their own unique powers. And Ron and Hermione could open a magical school for muggle - borns to learn magic in a more comfortable environment.
One idea could be focusing on the next generation of ninjas. For example, showing how Naruto's son, Boruto, discovers a new and dangerous threat that the older generation had overlooked. Another could be exploring the relationships that have changed over time, like Sasuke and Sakura's marriage and how they are raising their daughter.
A cool concept for a Mockingjay Epilogue fanfiction could be to tell the story from a different character's perspective. For instance, Gale's. He could be reflecting on his life after leaving District 12 and his feelings about Katniss and Peeta's relationship. Or you could write about the new generation of kids in Panem who are only hearing stories about the Hunger Games and how they view the world their parents fought to change.
One idea could be about the rebuilding of Hogwarts. The characters could come together to restore the castle to its former glory, dealing with hidden curses left by the Death Eaters during the war. Another could be exploring the relationships that were strained during the war, like Harry and Draco trying to find common ground and forgive past wrongs. And a third idea is focusing on the new generation of witches and wizards, how they are taught about the war and its significance in their magical history classes.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.