A really interesting plot could be that the Goblet of Fire chooses Harry not as a champion but as a key to unlock an ancient magic that only he and Hermione can understand. They then embark on a journey within the tournament tasks to find out what this magic is and how it relates to Voldemort's return. Along the way, they face opposition from other students who think Harry is cheating, and they have to prove their innocence while also dealing with their growing feelings for each other.
Well, a plot could involve Harry and Hermione being forced to enter the tournament together as a pair, against the rules. They then have to face challenges that are not only dangerous but also designed to test their relationship. For example, in one task, they might have to choose between saving each other or winning the task. This would create a lot of drama and tension between them. Also, there could be a sub - plot where they start to realize their feelings for each other during the tournament.
Another plot could involve Hermione using her vast knowledge to help Harry train for the tasks in the tournament in a more unique way. For example, she might find a way to combine ancient magic with modern spell - casting techniques. This could lead to some really exciting and unexpected moments during the tasks.
One interesting plot idea could be exploring what would happen if a different student was chosen for the Triwizard Tournament. Maybe a shy and overlooked student gets picked, and they have to overcome not only the tournament tasks but also their own insecurities. Another idea could be a love triangle involving characters that were not part of one in the original story. For example, a friendship between a Hufflepuff and a Slytherin turns into a complex relationship when feelings for Harry Potter get involved.
One idea could be introducing a new character from another universe who accidentally gets transported into the Goblet of Fire timeline. This character could have unique magical abilities that both fascinate and worry the Hogwarts students. For example, they might be able to control time in a different way than Hermione's time - turner. Another plot idea could be that Voldemort discovers a new dark magic spell from this other universe through a mysterious object. This could make him even more powerful and the trio has to find a way to stop him using knowledge from both universes. Also, what if the Goblet of Fire chooses a student from a completely different magical school in this crossover? It would create a whole new dynamic of competition and friendship.
Well, one plot idea could be that Hermione accidentally gets entered into the Triwizard Tournament instead of Harry. This would change the whole dynamic as she would have to face the dangerous tasks, and Harry would be in the role of her supporter and strategist.
One idea could be that the OC is a foreign exchange student who has unique magical abilities unknown to Hogwarts. They could help Harry in the Triwizard Tournament tasks in unexpected ways, like using ancient spells from their home country.
One idea could be that Harry has a group of friends from different houses who are all secretly in love with him. They start to form a sort of harem around him during the Triwizard Tournament. For example, Hermione could be using her intelligence to help him in the tournament in a more personal way, and Cho Chang might be more openly affectionate, and then there could be a girl from Beauxbatons who is also drawn to Harry's bravery.
A cool plot could involve a crossover with 'Star Wars'. Picture Harry using the Force in addition to his magic while competing in the Triwizard Tournament. Or perhaps a crossover with 'Alice in Wonderland' where the Goblet of Fire sends Harry down the rabbit hole and he has to navigate Wonderland's strange rules during the tournament.
Perhaps Naruto is mistaken for a new student at Hogwarts and is sorted into a house. He then has to deal with the politics of the school while also trying to figure out how to get back to his own world. He might make friends with Harry and the gang, and they all learn from each other's combat styles. For example, Naruto could teach them about hand - to - hand combat, and they could teach him more advanced magic theory.
One idea could be exploring what would happen if a different student was chosen by the Goblet of Fire. Maybe a Muggle - born student who has to face extra prejudice during the Triwizard Tournament. It would add a new layer of conflict and show how the wizarding world reacts to a 'less likely' champion.
Well, it could be that Hermione accidentally drinks a love potion during the Goblet of Fire events. Harry is the only one who can break the spell. The 'lemon' aspect might be some flirty and slightly spicy interactions as Harry tries to bring Hermione back to normal. For example, a scene where Harry has to hold Hermione's hand a bit longer than necessary while reciting a counter - spell.