One idea could be exploring how the changelings adapt to a new world order. Maybe they start to embrace new values and relationships that were previously foreign to them.
Perhaps a plot where a changeling discovers a hidden power within themselves during a time of great change. This new power could be both a blessing and a curse as they struggle to control it while also dealing with the changing world around them.
A really interesting plot could involve a group of changelings trying to form an alliance with other magical creatures during a time of upheaval. They have to overcome their own differences and the prejudices of the other creatures to succeed. This could involve lots of political intrigue, battles, and character development as they learn about each other and themselves in this changing landscape.
One idea could be exploring the origin of the changelings in more depth. Maybe there was a powerful magic that created them long ago.
One idea could be to explore a Changeling OC's struggle to fit into human society while hiding their true nature. For example, they might have to constantly lie about their abilities and origins, which could lead to some tense and dramatic situations.
Another plot idea might be a conflict between the traditional wizarding values and the more fluid and dream - like nature of the changelings. A changeling student at Hogwarts might face discrimination or misunderstanding from other students and teachers who don't understand their abilities. This could lead to a story of the changeling trying to prove their worth and show that their different nature can be an asset to the wizarding community.
One plot idea could be a changeling trying to fit into pony society without revealing its true identity at first. It could develop real friendships with ponies and then struggle with the guilt of deception. For example, it might fall in love with a pony and worry about how the pony will react when it discovers the truth.
Another plot idea might be that the wizarding world discovers Harry's changeling status and there is a big debate about whether he should be allowed to continue at Hogwarts. Some might fear his different nature, while others see it as an opportunity to learn more about the magical world's secrets.
A Changeling could be sent on a secret mission to infiltrate Fairy Tail by an evil organization. But as they spend time with the guild, they start to have second thoughts and eventually switch sides, becoming a valuable member of Fairy Tail and using their shape - shifting abilities to help the guild in battles.
One idea could be exploring the backstories of the minor characters in more detail. For example, you could write about how a side character got to be in the situation they are in during the show. Another plot idea might be a time - travel scenario where a character goes back in time and changes something that has a big impact on the overall story. Or perhaps a 'what if' story, like what if two characters who were enemies in the show became friends in the fanfiction.
A great plot could involve a hidden power in the ancient Digimon world. For example, a long - lost artifact that gives the possessor control over all Digimon. The story could follow a group of young Digimon and their human partners as they search for this artifact, facing many challenges along the way from other Digimon who also want the power for themselves. This would add a lot of adventure and mystery to the fanfiction.
Maybe it could be about Peter Parker experiencing five different alternate universes where he has different relationships with his friends and family. In one universe, he might be closer to Ned, in another he could have a different dynamic with MJ. Each time he jumps to a new universe, he has to adapt and face new challenges.
Maybe a changeling OC who gets lost in Equestria during a mission and is found by one of the main ponies. The OC could initially be distrusted, but as the story progresses, they form an unlikely friendship. The OC could then start to learn about friendship and love from the ponies, which would change their view of the world and themselves. For example, they could start to see that there are better ways to get the energy they need than stealing love.