Another plot could involve the OC being from a different time or dimension within Jumanji. Alex has to figure out how to get the OC back to their own place while also dealing with the normal chaos of the game. Along the way, they develop a deep friendship that changes both of them and how they view the game world.
One idea could be that a girl finds an old, dusty copy of Jumanji in her attic. When she starts to play, she's transported into the Jumanji world as a character she didn't expect, like a brave jungle explorer. She has to team up with the other players, who are also from her town but in different forms in the game. Along the way, she discovers hidden powers within herself and uses them to overcome the various challenges like wild animals and tricky puzzles.
Perhaps they could start a small business together in the OC. They face challenges like getting investors and dealing with competitors, all while their friendship evolves.
You can start with them having a bit of a rocky start. Maybe Alex is too brash for the OC's liking at first. But as they face challenges together in Jumanji, they start to see the good in each other. For example, Alex's courage impresses the OC during a fight with a game - created monster, and the OC's intelligence helps them solve a difficult puzzle, earning Alex's respect.
A crossover with 'The Lord of the Rings' could also be exciting. The Jumanji characters find themselves in Middle - earth. They could team up with the Fellowship to defeat both the Jumanji villains and the forces of Sauron. Picture the Jumanji rhino charging at orcs in the Battle of Helm's Deep.
Maybe there's a fanfic where Naruto and Alex are both investigating strange energy readings. Naruto senses it as something similar to chakra but with a different 'flavor'. As they dig deeper, they discover an alien race that wants to use Naruto's chakra for their own evil purposes. They have to combine their skills, Alex's military and scientific knowledge with Naruto's ninja abilities to stop the aliens.
A plot could involve them deciding to raise their children together in a non - traditional family setup. They might face some opposition from friends or family, but they stand strong and create a loving environment for their babies.
One idea could be them starting a new life together outside of prison. They might face challenges like finding jobs and dealing with the judgment of society. For example, Piper could use her business skills to start a small venture while Alex supports her morally. Another plot could be their journey in adopting a child and the unique family they create.
One idea could be to create a prequel fanfic. Show how the game was created or how it got lost in the jungle in the first place. Another idea is to write about a new set of characters finding the game in modern times and having completely different adventures than the ones in the movie. Maybe they have to deal with new rules or new types of challenges within the game world of Jumanji.
Perhaps an OC is a young archaeology student who idolizes Nathan Drake. They manage to get involved in one of his expeditions through sheer determination. Along the way, they learn from Drake and also teach him new things about modern archaeological research methods. It could be a story of growth and adventure for both characters.
One idea could be an OC who is a lightning - style user in Kumogakure and has to face a powerful enemy from another village. The OC could discover a new jutsu during the battle.