Another plotline could involve Harry's relationships within the Order. He has to deal with different personalities and egos. There could be conflicts and reconciliations as he tries to keep everyone united towards the common goal of defeating Voldemort. He might have to make tough decisions regarding who to trust and who not to.
Perhaps there's a plot where Harry has a vision of a future where the Order causes great harm. This vision is planted by an enemy of the Order. As a result, Harry decides to take pre - emptive action against the Order. He gathers his own group of allies who believe in his cause and they engage in a series of battles against the Order, with many twists and turns as the truth slowly unfolds.
Perhaps a plotline where the secret order discovers a hidden prophecy related to Harry that changes their whole strategy for protecting him. They then have to race against time to figure out how to use this new information to their advantage.
Some fanfictions explore a different relationship dynamic between them. Maybe Harry has a problem that only Hermione can understand and help him with, and this brings them closer in a way that's different from their normal friendship. It could be something related to his connection with Voldemort or his family history.
Well, in some 'harry as an animagus fanfiction', there could be a plot where Harry's animagus form is a unique animal that has special powers. For example, if he's a phoenix - like animagus, he could have the power of regeneration. This would add a whole new dimension to his battles against Voldemort. He could use his phoenix - like abilities to heal his friends and come back from near - death experiences.
Another plotline might be Harry training a group of new aurors. He could pass on his unique experiences and skills, while also dealing with the challenges of different personalities and abilities among the trainees. This would not only show his growth as an auror but also his leadership skills.
One interesting plotline could be Harry's journey to collect different rare dolls. Maybe he starts from a small local store and then travels around the world in search of unique dolls for his collection.
Well, a plotline might involve Harry getting caught between different mafia factions. He could be forced to choose sides, and this decision would have a huge impact on his life in the mafia world. Also, there could be a love interest in the fanfiction. For example, he falls for someone who is either in the mafia or has a connection to it, and this relationship complicates things even more.
One interesting plotline could be Harry's journey to master different sword techniques. Maybe he discovers ancient sword-fighting styles and has to train hard to master them, facing challenges like difficult instructors or scarce resources.
Another plotline might involve Harry inheriting a hidden magical ability from an ancestor. He then has to learn how to control and master this new power while dealing with the challenges it brings, like the envy of some of his classmates and the interest of dark wizards.
One interesting plotline could be Harry growing up in a completely different magical family and having to adjust to their unique traditions. For example, if he was adopted by a family of potion - makers, he'd have to learn their special techniques.