One plotline could be that Hermione decides to start a new trend at Hogwarts by introducing muggle - style bikinis. She wants to break the traditional wizarding clothing norms and faces some resistance from the more conservative students and teachers at first, but eventually, it becomes a popular new style among the younger students.
A possible plotline is that there is a magical pool at Hogwarts that only reveals itself during a certain time of the year. When it does, the students all put on their bikinis (which may have some magical properties like changing colors or protecting from underwater spells) and have a grand time exploring the pool. There could be a mystery related to the pool as well, like it was created by a long - forgotten wizard for a specific purpose.
A simple plotline could be that Tony Stark, being the genius he is, discovers a way to enter the wizarding world. He meets Harry Potter and they exchange knowledge. Tony shows Harry some of his high - tech gadgets like the Iron Man suit, and Harry shows Tony some basic spells. They then team up to fight a new threat that emerges in the wizarding world that requires both magic and technology to defeat.
Perhaps there is a magical tournament in the wizarding world that is modeled after the jousts and challenges in King Arthur's court. Harry is forced to participate and as he does, he realizes that there are deeper connections between the values of the Arthurian era and the current state of the wizarding world. He then uses this knowledge to bring about positive change in the wizarding community.
Sure. Some fanfiction might use the idea of bikinis in a more creative way. It could be part of a fashion show within the wizarding world. Wizards and witches from different houses participate in a beach - themed fashion show, and the bikinis are designed with magical elements. The story could revolve around the competition, the creativity of the designs, and the relationships between the characters involved.
A possible plotline could be that during an eclipse, Harry's glasses become a portal to another dimension within the wizarding world. He steps through and finds himself in a place where the rules of magic are different. Another plotline might involve the glasses being enchanted by an eclipse - influenced spell that causes Harry to see things that others can't, like hidden messages on Hogwarts' walls.
Another plot could involve Harry and Katniss being summoned to a parallel dimension where they are the only ones who can stop an ancient evil. They have to combine their unique skills, Harry's knowledge of magic and Katniss's survival and combat skills. They start off as strangers but gradually develop a deep friendship as they face numerous challenges together, like fighting off dark creatures and solving magical - mechanical puzzles.
One possible plotline could be Harry discovers his latent archmage powers early on and uses them to quickly defeat Voldemort. Another could be that he has to go on a journey to learn how to fully control his archmage abilities while still dealing with the normal Hogwarts stuff like classes and friendships.
One possible plotline could be that Harry discovers his siren abilities during his time at Hogwarts. At first, he's confused and scared by these new powers. He might accidentally use his siren voice to make a teacher or a student do something they don't want to. Then he has to learn to control it with the help of Dumbledore or another magical creature.
The businessman could be trying to revolutionize the wizarding education system from a business perspective. He sees potential in making Hogwarts more efficient and cost - effective. He proposes ideas like installing modern muggle - like technology for administrative purposes or outsourcing some non - magical aspects of the school's operations. This causes a stir among the Hogwarts staff and students. Another plotline could be that he is a muggle - born who made it big in the muggle business world and now wants to use his wealth and influence to improve the status of muggle - borns in the wizarding world. He funds projects and initiatives that aim to bridge the gap between muggles and wizards.
Perhaps in this fanfiction, there could be a new, unexpected hero emerging. Maybe Neville Longbottom finally steps up in a big way. Since Harry is dead, Neville could be the one to find a new way to defeat Voldemort, like discovering a long - lost spell or uniting the houses in a way that has never been done before.
One possible plotline could be that they are long - lost relatives from different magical or fantastical worlds. Maybe there's a prophecy that involves both of them.