There could be a plot where a mysterious figure at the school starts leaving clues that lead to a Hunger Games - style mystery. The students have to follow these clues and solve puzzles to figure out what's going on. It could be a test by a secret society within the school. Or it could be that a group of students start a rebellion against a new, tyrannical principal, and they use the concepts from the Hunger Games as inspiration for their fight.
Well, a plot might involve a new student who arrives at the school and uncovers a secret Hunger Games - like game that has been going on for years among the faculty. Or perhaps a group of students form an alliance to change the school's strict and unfair rules, much like the tributes in the Hunger Games form alliances. They could use their wits and skills to outmaneuver the school administration.
One idea could be to have the previous victors be forced to compete again. This would add a whole new level of drama as they already thought they were safe. They could also form alliances based on their past experiences in the games.
One possible plot idea could be a new kind of alliance formed during the Mating Games. Contestants might team up not just for survival but also for the sake of love. For example, two tributes from different districts could fall in love and try to find a way to both survive and be together in the end.
One idea could be that Cato and Clove are in a high school version of the Hunger Games training program. They could be rivals at first, constantly trying to outdo each other in combat skills training. Then, as they face tougher challenges together, they start to develop a grudging respect for one another.
One idea could be that the high school is divided into districts and students from each district are randomly selected for a series of academic and athletic challenges, with the winner getting a full scholarship. Another could be a Hunger Games - style battle but instead of death, the losers have to do community service tasks for the school for a whole semester. And perhaps there's a secret alliance among some students who try to change the rules from within.
A great plot for Hunger Games Book 4 Fanfiction could be about a new character who discovers a hidden power within the ruins of the old arena. This power could be something that could either save or destroy the new - found peace in Panem. Or perhaps a story where the children of the main characters from the original trilogy face a new challenge that is related to the dark past of the Hunger Games, like a resurgence of the old Hunger Games ideals in a small, underground movement. Also, a plot about the Capitol trying to rewrite history and the fight of the districts to preserve the truth would be really interesting.
One idea could be that the college students are divided into different academic departments as districts. They have to compete in challenges related to their studies, like a science department having to solve complex equations under pressure. Another could be that the 'tributes' form alliances based on their dormitories.
One idea could be a tribute who has a unique survival skill like being able to communicate with animals in the arena. They could use this to gather information about hidden resources or approaching threats.
Perhaps the blight is a man - made weapon created by the Capitol to make the Hunger Games more 'exciting'. In the fanfiction, a group of tributes could team up to find a way to expose this and stop the Capitol from using such cruel tactics. They might face many challenges as the Capitol tries to keep their secret.
One plot idea could be exploring Madge's life before Katniss went to the Hunger Games. Maybe she had her own struggles or secrets in District 12. For example, she could be involved in an underground resistance movement that not many knew about.
One idea could be a revolution within the 100th Hunger Games. The tributes from different districts secretly plan to overthrow the Capitol's control over the games. They start by forming alliances not just for survival but to spread their message of resistance among the other tributes.