One interesting concept is the idea of house - elves gaining more rights. In some fanfictions, they form unions or rebel against the traditional wizarding hierarchy. Another concept could be a house - elf having magical abilities that are far beyond what is shown in the original books, like being able to perform extremely powerful spells. Also, there are fanfictions where a house - elf forms a deep friendship with a wizard or witch outside of their serving duties, which is quite different from the normal master - servant relationship in the original story.
In Harry Potter house elves fanfiction, a common concept is the role reversal. Instead of being servants, house elves are sometimes depicted as the ones in charge. They could be the leaders of a secret magical society within the wizarding world. Some fanfictions also focus on the relationships between different house elves. They might have their own social hierarchies, rivalries, or alliances. And there are stories that show house elves using their natural talents, such as their ability to apparate within a house, in really creative ways, like using it to play pranks on wizards who have been mean to them.
In some fanfictions, house unity might be centered around a new magical sport or event that requires the combined skills of all the houses. The unique traits of each house, like Gryffindor's courage, Hufflepuff's loyalty, Ravenclaw's wisdom and Slytherin's cunning, are all needed to succeed in this activity. This not only promotes unity but also a new level of understanding between the houses.
One idea could be that Harry grows up with a very different set of values. House elves are known for their loyalty and hard work. So, Harry might be more in tune with serving others selflessly. For example, he could be more eager to help his classmates with their problems without expecting anything in return.
Dobby would likely be one of the important house elves. He has shown great courage and a willingness to go against the norm to help Harry in the original series. In this fanfiction, he could be the leader among the house elves in the rescue mission.
Dobby is often very popular in fanfiction. Since he was already a well - developed character in the original series, fanfiction writers like to expand on his story further. He might be shown having more adventures or getting into different kinds of trouble. Another popular one is Kreacher. Writers may explore his complex personality more deeply, perhaps showing a side of him that was not fully explored in the books, like his loyalty to the Black family in new and interesting ways.
One idea could be a story about a house - elf who discovers a hidden magic within themselves that allows them to break free from the traditional bonds of servitude. They could then go on a journey to find other house - elves and teach them this new magic.
One interesting concept could be exploring more about the Marauders' time at Hogwarts. Fanfiction might expand on their adventures, like pranks they played that were never mentioned in the original book. Another could be different interpretations of Sirius Black's escape and his relationship with Harry during that time.
Some fanfictions in Harry Potter 2 might play with the idea of the basilisk having different powers or weaknesses. It could also explore the idea of a hidden connection between Ginny and the Chamber of Secrets that goes beyond what was in the original story. There might be fanfictions that change the role of certain characters, like making Neville a more central figure in solving the mystery of the Chamber.
One interesting fanfiction could be about an elf who discovers a hidden magic within Hogwarts that no one else knew about. This elf uses this magic to help protect the school during a dangerous time.
Perhaps Harry, being raised by house elves, has a very different view of the wizarding world's social hierarchy. He may see the unfair treatment of house elves as completely unacceptable from a young age and strive to change it. This could lead to him getting into conflicts with some of the more traditional pure - blood families who rely on house - elf labor.
One possible plotline could be that the Potter elves teach Harry unique magic that is different from what he would learn at Hogwarts. For example, they might show him ancient elf magic that gives him an edge in dealing with dark forces. Another could be that the elves raise Harry with a strong sense of family and loyalty, which makes him more empathetic towards those who are often overlooked in the wizarding world, like house - elves themselves.