It could be that Harry throws the tournament as a way to promote unity among the wizarding community. He might include challenges that require teamwork, like a group spell - casting competition where participants have to combine their magic to achieve a certain goal. And he could also invite wizards from other schools to participate, not just Hogwarts students.
Obviously, the students from Hogwarts would be the main participants. The Gryffindors, Hufflepuffs, Ravenclaws and Slytherins would all be eager to show their skills.
Perhaps in this fanfic, the tournament serves as a catalyst for Harry to emancipate himself from the shadow of Voldemort. Instead of just being the target of Voldemort's attacks, he uses the tournament's tasks and the attention it brings to assert his own identity and power, showing that he's more than just a pawn in the fight against the Dark Lord.
It could involve Harry Potter participating in a dueling tournament set in Japan. Maybe he meets new wizards, discovers unique Japanese magical spells and creatures during the tournament. There could also be cultural clashes and fusions, like how the Western style of dueling he's used to interacts with the Japanese magical traditions.
Maybe in the fanfic, the archery tournament is a part of a larger magical competition among different wizarding schools. The archery part has some really high - stakes rules. For instance, if you miss the target three times, you get turned into a small animal for an hour. A Slytherin student tries to cheat by using a charmed bow that always aims perfectly, but gets caught by the enchanted referees. Meanwhile, a Hufflepuff student discovers that she has a natural talent for archery and becomes an underdog favorite in the tournament.
One possibility is that Harry has been betrayed in some way by the Weasleys. Maybe he discovers they've been using him for their own gain, like getting access to his fame or fortune. So, in a fit of anger and disappointment, he throws them out.
Another reason could be that he is being pressured not to take part. This pressure could come from his friends or mentors. They might think that the tournament is too risky for Harry, especially considering his past encounters with danger. They could be worried that the tournament is just a way for his enemies to target him more easily. So, they persuade him to refuse, and he listens to their concerns.
He could win the tournament and gain great fame. In many fanfics, Harry might show off some new spells he's learned, impressing everyone.
Well, it could be about Naruto getting frustrated during a training session and starts throwing random ninja tools around, which accidentally creates a new jutsu.
One possible plot could be that Broly, still new to the ways of the other universes in the Tournament of Power, initially struggles to work with his team. He's so used to fighting alone. But as the tournament progresses, he starts to understand the importance of teamwork. He forms an unlikely alliance with a smaller, more strategic fighter. Together, they come up with unique battle plans that surprise their opponents.
Maybe in the fanfic, the Tournament of Power is rigged from the start. Naruto's team realizes this early on. Their journey could be about finding evidence of the rigging while still competing. They might encounter traitors within their own ranks who are working for the ones behind the rigged tournament. Along the way, Naruto has to use his skills not only in battle but also in diplomacy to keep his team together.