Another plot could involve the main character faking friendship with the person they seek revenge on. As they get closer, they gradually manipulate the situation to make the target's life miserable, such as causing them to lose important relationships or opportunities.
One idea could be that the main character discovers a long - hidden secret about the person they want revenge on, like a family scandal. They could use this knowledge to publicly shame the target.
One idea could be that Spider - Man discovers a new villain who has a personal vendetta against him for something he unknowingly did in the past. This villain targets the people Spider - Man cares about, like Aunt May or Mary Jane, forcing him to go on a full - throttle revenge mission to protect them and clear his name.
One idea could be that Naruto discovers his family has been keeping a dark secret from him all along. Maybe they were involved in some sort of betrayal in the ninja world that affected many lives. Naruto then decides to take revenge by exposing their actions to the village. He could start by gathering evidence secretly, like old mission reports or testimonies from other ninjas who might know something.
One idea could be that Sakura discovers the true identity of the person who wronged her and uses her unique skills, like her intelligence or a hidden power, to outwit them. For example, she could pretend to befriend the enemy and then expose their secrets at the right moment.
One idea could be Percy discovers a long - forgotten prophecy that predicts a major betrayal within Olympus and he has to navigate through the politics and power struggles to expose the traitor. Another could be Percy teams up with some of the minor gods who feel neglected by the Olympians to take revenge in a more peaceful, but still impactful way, like through protests or revealing the Olympians' misdeeds to the mortal world.
Perhaps Naruto in this fanfiction has a grudge against a certain basketball team in the Kuroko no Basuke universe because they remind him of an enemy from his own world. So, he joins another team and uses his shadow clone jutsu to create multiple versions of the best players on his team during a game. This gives his team an unfair advantage and is his form of revenge in the basketball world.
One idea could be that Danny discovers a new ghostly power that he uses to take revenge on a group of bullies who have been tormenting his friends. He could use his intangibility in a creative way, like sneaking into their lockers and making their things disappear.
One idea could be exploring what would have happened if Anakin had a different mentor during his fall to the dark side. Maybe a Jedi who was more in tune with his emotions could have guided him better.
Well, you could have a fanfiction where the eliminated contestants form their own alliance outside the main game and try to sabotage the remaining players. Or perhaps a plot where the island itself has some sort of mystery that the contestants have to solve. It could be an ancient curse or a hidden treasure. Also, a story about a character having a secret power or ability that they gradually discover during the competition could be really cool.
One idea could be an OC who has a special talent like being able to communicate with animals. This could give them an edge in the challenges. For example, they might use birds to spy on other contestants or get help from a friendly bear to complete a strength - based task.
One idea could be Harry being raised by the Weasleys from a very young age. He'd grow up with their large family dynamic, learning magic in a more chaotic but loving environment. It might change his personality a bit, making him more outgoing and confident earlier. Another plot could be him being raised by Remus Lupin. Lupin would instill in him a deep understanding of the dark arts in a more academic way, and also teach him about acceptance of his own lycanthropy - like condition if he were to inherit it. And a third idea is Harry being raised by the centaurs in the Forbidden Forest. He'd learn their unique brand of magic, which is more in tune with nature, and have a different perspective on the wizarding world and its relationship with the natural world.