Maybe Flynn Rider is on a quest for a rare jewel and it leads him to Arendelle. There, he encounters Elsa. Elsa is initially afraid she might accidentally harm Flynn with her powers. However, Flynn is intrigued by her powers and helps her see that they can be used for more than just isolation. They could team up to protect Arendelle from an approaching threat using Elsa's powers and Flynn's street - smart skills.
Flynn is confident and a bit of a rogue. He'd likely be drawn to Elsa's mystery and power. Elsa, on the other hand, is reserved and cautious. Flynn would probably try to break through her shell with his charm and humor. Their different personalities could create a lot of tension at first, but also a great deal of growth. For example, Flynn could teach Elsa to be more carefree, while Elsa could teach Flynn about responsibility.
Another interesting plot could be that the reader is a time - traveler from the future. They come to Arendelle during Elsa's reign and know about all the events that are going to happen. The reader tries to help Elsa avoid some of the hardships she will face in the future, but in doing so, they accidentally change the course of history. This creates a complex situation where Elsa and the reader have to work together to set things right while also dealing with their growing feelings for each other.
One idea could be that the male reader is a traveler who gets lost in Elsa's kingdom. He stumbles upon Elsa while she is using her powers, and at first, she is wary of him. But as they start to communicate, they find that they have a shared love for nature. And through their adventures exploring the frozen landscapes together, a relationship begins to form.
One idea could be that Percy and Elsa meet when some sort of magical rift pulls them into the same world. Percy's water powers and Elsa's ice powers could either clash or combine in interesting ways. For example, they might have to work together to stop a new threat that is causing chaos with water and ice elements in the merged world.
The plot could involve Flynn Rider trying to reform the Stabbington Brothers. He might start by outsmarting them in a heist, but instead of turning them in, he offers them a chance to change their ways. They could initially be resistant, but over time, they start to see the benefits of Flynn's way of life.
One idea could be them going on a new adventure outside of Corona. Maybe they discover a hidden land full of magical creatures that they have to protect together. Another could be Flynn teaching Rapunzel some self - defense skills in a more comical way. For example, he tries to show her how to use a sword but she ends up using it like a gardening tool at first.
A fanfiction could explore a backstory where Flynn Rider and the Stabbington Brothers were once friends or at least allies. They could have had some sort of falling out over a big heist gone wrong. The story could then focus on how they might overcome their differences and work together again. For example, Flynn discovers that the Stabbington Brothers were set up in the previous heist and he decides to help them clear their names.
Maybe in the fanfiction, Wolf is actually an undercover agent sent to protect Alex Rider without his knowledge. As they interact, there are misunderstandings at first. Alex thinks Wolf is a threat, but then they discover a common enemy. Their relationship then develops into a strong alliance as they work together to take down the bad guys, with Wolf teaching Alex some of his more unorthodox combat techniques along the way.
One idea could be that Percy, with his water powers, and Elsa, with her ice powers, team up in a magical realm. They could face a common enemy that threatens both their worlds. And as they work together, they start to understand each other's powers more deeply, leading to a strong bond.
A fanfic about Flynn teaching Rapunzel how to be a better horse rider could be interesting. It would be a cute and light - hearted story, with Flynn showing his more patient side as he helps Rapunzel overcome her initial fears of riding. There could be some funny moments like Rapunzel naming the horse something really silly and Flynn having to pretend he likes it.