Perhaps a story where the magical world is trying to integrate more with the non - magical world in the future. Harry Potter's kids could be at the forefront of this movement, dealing with both the excitement and the challenges that come with it. There could be political intrigue as some wizards oppose this integration.
A future fanfiction could focus on a new tournament at Hogwarts that combines elements from the Triwizard Tournament but also includes new magical creatures and challenges. The students would need to train in different types of magic, like time - traveling spells and ancient forms of divination, to succeed in this tournament.
A plot idea could be that the Time - Turner in Harry Potter is actually an ancient magical version of the Flux Capacitor. Hermione discovers this connection while researching in the library. She then tries to build a device that can combine the two technologies. This leads to her accidentally traveling to the Back to the Future universe. There, she meets Marty McFly and they have to work together to fix the time rift that her experiment created.
One idea could be that the characters find a way to prevent certain dark magic spells from ever being created. This would change the future by reducing the power of the dark wizards. Another could be that they manage to unite the wizarding world and Muggle world earlier, thus avoiding future conflicts.
In the 'female harry potter reading the future fanfiction', there could be a plot where she reads about a future full of technological advancements in the wizarding world. For example, new spells are developed using some form of magical technology. She might also read about a future where her friends have different fates. Hermione could be leading a research project on ancient magic, while Ron is in charge of a new Quidditch league. And she has to decide if she wants to be part of these new developments or go her own way.
Perhaps in the fanfiction, Neville discovers a new form of magic that can heal the damage done to the Forbidden Forest during the battles. He shares this knowledge with others, and together they restore the forest to its former glory. This not only helps the magical creatures that live there but also has a positive impact on the overall environment of the wizarding world, contributing to a better future.
You could write about the next generation of Hogwarts students facing a completely different kind of threat than Voldemort. Maybe an inter - dimensional invasion that requires them to learn magic from other magical cultures. This would involve a lot of world - building and creating new magical species and cultures. It could also show how the old traditions of Hogwarts adapt to this new threat.
One idea could be that Harry and Hermione find a time - turning device. They use it to go back and change key events in the wizarding war. For example, they might prevent Cedric's death, which could have a huge impact on the future of Hogwarts and the wizarding world.
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.
A traveler could be from a different magical realm entirely and come to the Harry Potter universe. They bring with them unique magical abilities that both fascinate and frighten the wizards in the Harry Potter world. This could lead to a series of adventures where they either share their knowledge or are hunted down by those who fear the new magic they possess.
One idea could be that Hecate, being the goddess of magic, takes Harry Potter under her wing secretly to teach him ancient and powerful magic that Dumbledore doesn't know. This could lead to Harry having new abilities to fight Voldemort.
A possible plot in Harry Potter Planeswalker fanfiction is that a Planeswalker accidentally brings a dangerous creature from another plane into the Hogwarts grounds. This causes chaos as the teachers and students have to figure out how to deal with it. It could also be that a Planeswalker has a special connection to the magic in the Harry Potter world, like being able to sense the presence of magic in a way that wizards can't. They could use this ability to discover hidden secrets about Hogwarts or the wizarding families. Maybe a Planeswalker is on a quest in the multiverse and the Harry Potter world is just one stop on their journey, and their actions in the wizarding world have consequences for their overall mission.