Maybe in the fanfiction, Sulley discovers that Randall has a hidden side. Randall might be secretly trying to protect the monsters from a new threat in the human world that no one else is aware of. Sulley initially doubts Randall but as he sees the evidence, he decides to help Randall. They then team up and use their different skills - Sulley's big and strong nature and Randall's sneaky and intelligent ways - to overcome the threat and in the process, their relationship changes for the better.
In a different take, Sulley and Randall could be partners in a secret experiment within Monsters Inc. They might be working on a new way to collect energy from kids without scaring them. As they work closely together, they discover that they have a lot in common when it comes to their love for the monster world and their hopes for its future. This shared passion could lead to a deeper bond between them, different from the adversarial relationship in the movie.
It's also because their personalities are so different yet complementary. Sulley is big and strong while Mike is small and smart. Fanfiction writers can play with these characteristics in various ways. For example, they can create stories where Mike's ideas and Sulley's ability to execute them lead to amazing results. This contrast makes for interesting and engaging stories.
One good example could be fanfictions that focus on their adventures outside of work. For instance, a story where they go on a trip to a new, uncharted part of the monster world. Another might be ones that explore their friendship during their childhoods, like how they first met at monster school.
Friendship is a very common theme. Since the OC is a new character, often the story focuses on how they become friends with Sulley. For example, they might help each other out in tricky situations at Monster Inc.
It could be about Boo using her experiences in the monster world to make a difference in the human world. Maybe she becomes an advocate for better understanding between humans and monsters.
It's about the world of Monsters Inc. in a graphic novel format. It likely shows the story of the monsters like Sulley and Mike, their adventures in the monster world, and perhaps their experiences with the human world through a series of illustrated panels.
A great Monsters Inc bedtime story could be about the first time Sulley met Boo. Sulley was on his regular job of scaring kids when he accidentally let Boo into the monster world. At bedtime, Sulley was worried about what to do with Boo. But as he spent time with her, he realized she was not scary at all. Instead, she was a sweet little girl. Sulley then made a little bed for her out of soft monster fur. He told her a story about the stars in the monster sky, which were actually made of the leftover energy from the kids' dreams. Boo fell asleep listening to this story, and Sulley learned that there was more to humans than just screams.
Monsters Inc. is set in a world where monsters generate energy from children's screams. But as the story progresses, we discover that laughter can generate even more powerful energy, leading to a major shift in the monsters' way of doing things.
One idea could be exploring the backstories of the monsters more deeply. For example, what was Sulley's life like as a young monster? Another could be a story where Boo somehow returns to the monster world as an adult. Or a fanfiction about the monsters having to deal with a new kind of energy source other than screams.
The Monsters Inc Read Along Story is centered around the world of monsters. It probably includes the unique setting of the monster factory, the different types of monsters that work there. It may tell how they enter the human world through closet doors to scare children. And it surely also touches on the relationships between the characters, like the friendship between Sulley and Mike which is a key part of the Monsters Inc story.