Hermione could be a key character. She is always by Harry's side, and her intelligence and knowledge of the wizarding laws would be invaluable in the lawsuit. She might be the one doing all the research and preparing the legal arguments for Harry.
Maybe the ministry reads Harry Potter fanfiction because they are interested in the creativity of the fans. Fanfiction can offer new perspectives on the existing story, and they could find some interesting concepts that could potentially be incorporated into their own understanding or even the official wizarding world in some way. Also, it could be a way for them to monitor if there are any dangerous or subversive ideas floating around in the fan - created stories.
Fanfiction about Harry Potter, Susan Bones and the Ministry can take various directions. One could be a story where Susan Bones tries to reform the Ministry from within, with Harry's influence. Another could be a romantic story where she falls in love with someone within the Ministry and Harry helps her navigate through the relationship while dealing with Ministry - related issues. There are also possibilities of her being part of a secret group within the Ministry that Harry is unaware of at first, but later they join forces.
If the ministry read Harry Potter fanfiction, they might be quite surprised. Some fanfictions have very creative and out - of - the - box ideas that could either amuse or shock them. They might find some interpretations of the magical world that they had never considered before.
They're popular because many fans feel that the Ministry in the original books had a lot of flaws. These fanfics allow them to explore and expand on those flaws in creative ways.
In this fanfiction, it could be that a new law is passed in the wizarding world. The law states that anyone with the ability to defeat a dark lord must be executed to prevent them from becoming a dictator in the future. Harry, being the only one known to have defeated Voldemort, is targeted by the Ministry. He has to rely on his old Hogwarts allies and some unexpected new friends within the Ministry to fight this unjust law and save his own life.
Maybe Harry Potter decides to sue the Ministry because they have been withholding important information about his family or his true destiny. It could also be that the Ministry has been unjustly persecuting him or his friends, and he decides to take legal action within the wizarding world's framework.
Another aspect could be the emergence of new magical laws or lack thereof. Without the Ministry to enforce regulations, magic could be used more freely, but also more dangerously. Some wizards might start experimenting with dark magic without fear of punishment, while others would strive to create a new, more just system of governance from the ground up.
In a fanfic, Harry Potter could inherit the Ministry. There could be some ancient wizarding law that gives him the right to own it. For example, if he is related to an old and powerful wizarding family that has a claim to the Ministry. He might not even be aware of this at first, but as the story unfolds, he discovers his right to own the Ministry.
Well, if Harry Potter owns the Ministry in fanfic, he might start by reforming the laws. For example, he could change the laws regarding house - elves, giving them more rights. He'd also probably make big changes to the education system at Hogwarts. Maybe he'd introduce new subjects that are more relevant to the modern wizarding world.