One good idea is to base a story on a unique location. For example, a forgotten island full of strange creatures. Another idea could be to create a story around a character with an extraordinary ability like the power to control time. And you can also get ideas from historical events and give them a fictional twist.
The Gingerbread Man could stumble upon a hidden village of other gingerbread creatures. However, this village is in danger because a big flood is coming. So, the Gingerbread Man has to use his wits and speed to find a way to save the village. Maybe he could build a dam with the help of the other gingerbreads using sticks and stones. This would make him a hero in the gingerbread community.
One idea could be a story where Sinbad, the adventurous sailor, stumbles upon Jafar's lair during one of his voyages. Jafar, being the cunning sorcerer, initially sees Sinbad as a threat but then realizes he could use Sinbad's skills for his own gain. Sinbad, on the other hand, tries to outwit Jafar and free those who are under Jafar's spell in the lair.
Imagine the Gingerbread Man enters a singing competition in a far - away land. All the participants are different magical creatures. He has to come up with a unique song that represents his gingerbread identity. Along the way, he makes friends with a mermaid who gives him some tips on how to sing underwater - themed songs. In the end, whether he wins or not, he has a great adventure and learns about the power of music and friendship.
One idea could be a story where Tinkerbell and Vidia have to team up to save Pixie Hollow from a mysterious dark force. They start off not getting along well, as is their usual dynamic, but as they face challenges together, they learn to respect each other's strengths and become friends.
One idea could be a story where a group of Hot Wheels cars come to life in a toy store at night. They have races through the aisles, jumping over boxes and avoiding being caught by the night janitor. It could be an adventure full of speed and close calls.
Here's a cool idea for a Harry Potter fanfic. What if there was a parallel Hogwarts in another dimension? Harry and his friends accidentally stumble into this dimension while working on a new spell. In this parallel Hogwarts, the houses are different, and the magic is more wild and unpredictable. They have to find a way to get back home while also dealing with the challenges and mysteries of this new world. It could involve new magical creatures, different types of magic classes, and an entirely new set of characters that they have to interact with.