Perhaps in a post - apocalyptic setting, cars are the only means of transportation left and they form alliances with humans. For example, a group of survivors team up with a fleet of modified cars to fight against a common enemy, like a gang of raiders. The cars could have unique personalities, with some being brave, some cautious, etc.
One idea could be that cars have human forms and they compete in a global racing championship that's not just about speed but also about strategy and teamwork. The main character, a race car in human form, has to overcome his fear of a particular track.
One idea could be a story where a mechanic has a special bond with a sentient car. The car has unique abilities and they go on adventures together, like solving mysteries in a post - apocalyptic world where cars are the key to finding resources.
Another plot could be that a group of humans accidentally stumble into the world of Littlefoot. Littlefoot is curious about them and decides to approach them. The humans are also intrigued. Some of the humans want to study Littlefoot and his friends, while others want to protect them from potential harm. This creates a complex situation where Littlefoot has to figure out who to trust among the humans.
Another plot could involve a human who has a deep knowledge of ancient Pride Lands lore. The Lion Guard discovers the human while on a quest to solve a mystery that is endangering their home. The human helps them decipher old symbols and tales, leading to the discovery of a powerful weapon or magic that can save the Pride Lands.
One idea could be a story where a classic car comes to life and has adventures around the city. It could interact with people, help solve mysteries, and make friends along the way.
One idea could be exploring the backstories of the new characters introduced in Cars 3. For example, you could write about their early racing days, their dreams, and how they got to where they are in the movie. Another idea is to create an alternate ending. Maybe Lightning McQueen doesn't win the big race, and how that would change his relationships and his future in the racing world. You could also write a fanfiction about a friendship between a minor character and a main character that wasn't fully explored in the movie.
In a 'bionicle meets human fanfiction', there could be a story where a human scientist creates a device that can open portals to different dimensions. One day, a Bionicle steps through one of these portals into the human world. The human is initially scared but soon realizes that the Bionicle is not a threat. They start to explore each other's worlds together. The Bionicle shows the human his world of high - tech machinery and unique landscapes, while the human shows the Bionicle things like nature on Earth, which the Bionicle has never seen before. As they travel between the two worlds, they also face challenges from both sides. Some Bionicles might not trust the human, and some humans might want to use the Bionicle's technology for their own gain.
One idea could be a crossover between a classic muscle car like a Mustang and a high - tech futuristic vehicle from a sci - fi movie. The story could revolve around a race where the two very different cars compete, with the Mustang having its raw power and the futuristic car having advanced gadgets. Another idea is a crossover between a famous racing car from a video game and a real - world luxury car. They could go on a road trip together, with the racing car's speed and the luxury car's comfort creating an interesting dynamic.
Perhaps a human turns into a car in the fanfiction. This human - turned - car could then participate in the high - stakes races in the Cars universe. They would have to learn how to handle their new form, like dealing with different terrains and using their newfound speed and agility to compete against the other cars. It would be a journey of self - discovery as they adapt to their new life as a vehicle.
Another plot could involve the 'not - quite - human' character forming an unlikely friendship with a human. Through this relationship, they both learn about acceptance and the differences between their worlds. For example, the human could teach the non - human about things like music or art, while the non - human shows the human a different perspective on life.