One idea could be Calvin becoming a successful artist, using his wild imagination from childhood in his works. Maybe he creates a series of paintings inspired by his old adventures with Hobbes.
Another plot could be Calvin growing up to be an inventor. He might use his creativity to develop new technologies that help solve environmental problems. For example, he could invent a device that converts waste into clean energy, just like how he used to come up with all sorts of wacky inventions as a kid.
It could be about Calvin becoming an artist. He might use his wild imagination from his childhood adventures with Hobbes to create unique and thought - provoking artworks. Maybe he has an exhibition where all his works are inspired by the days of building forts and having snowball fights with Hobbes.
Obviously, Calvin himself as the main character. His parents could also play important roles, showing how their relationship with Calvin has evolved as he grew up.
In a 'Peter Pan Grown Up Fanfiction', a great plot could be that Peter, as an adult, realizes the importance of family. He goes back to Neverland to find that the Lost Boys are in danger because of some dark magic. Using his new - found maturity and the skills he has learned in the real world, he has to find a way to save them. He might also face the challenge of dealing with Tinker Bell, who is not used to this new, grown - up Peter.
One idea could be the characters going on a big adventure together, like a road trip across the country. They could face various challenges along the way and learn more about themselves and their friendships.
One idea could be that Ladybug and Chat Noir have finally defeated all the major villains in Paris and are now trying to adjust to a normal life. But they find it hard as they have grown so used to the thrill of the fight. Another could be that they have to face a new threat that is related to their past battles but in a more complex and grown - up way, like an enemy using the remnants of old akumas to create a powerful new one.
One idea could be that Ash becomes a world - renowned Pokémon master and Misty is a successful water - type Pokémon gym leader. They reunite after years apart and realize their feelings for each other have deepened. They then embark on a journey together to explore new regions and discover rare Pokémon.
Well, in a grown - up 'My Hero Academia' fanfic, we could see the characters dealing with the long - term consequences of their actions during their youth. Maybe some of the battles they fought earlier left scars that are now affecting their abilities or mental states. They could also be involved in mentoring a new generation of heroes, and the clashes between the old - school ways and new ideas could create some really engaging storylines.
In a grown - up fanfic, Calvin's character development could involve him learning to handle relationships better. He was a bit of a loner as a kid, with Hobbes as his main confidant. As an adult, he might struggle with romantic relationships or making new friends. Hobbes could help him navigate these new waters, and through this process, Calvin could become more empathetic and understanding. Hobbes himself might develop a more complex personality, perhaps showing a side of him that is more vulnerable, which was not as evident when they were kids.
Maybe Calvin discovers a hidden power within himself while on a mission in a new world in the fanfiction. This power could be related to his connection with the tesseract and help him save the day. For example, he could use it to communicate with beings that others can't reach.
Another idea is that all the characters are now parents themselves. They have to balance their work at Monsters Inc with raising their own little monsters. It could show how they use their experiences as scared kids or scarers to be better parents.