There could be a plot where Chat Noir's injury makes him question his role as a superhero. He might struggle with self - doubt and worry about being a burden to Ladybug. This can lead to some emotional moments between the two characters as Ladybug tries to boost his confidence.
One common plotline is Ladybug having to take on more responsibility while Chat Noir is injured. She might have to fight akumas alone and also take care of Chat Noir at the same time.
A common plotline is Chat Noir getting injured while trying to save civilians. He might jump in front of a dangerous attack aimed at an innocent bystander. This shows his heroic nature and self - sacrifice.
One common plotline is that Ladybug has to take on a more challenging role in protecting Paris alone while Chat Noir is injured. She might struggle with the extra pressure and worry about her partner. Another could be Chat Noir dealing with his injury and trying to hide it from Ladybug so as not to worry her. For example, he could keep getting into dangerous situations while still hurt, thinking he can handle it.
One common storyline could be Chat Noir getting injured during a battle with a powerful akuma. He might struggle to hide his injury from Ladybug while still trying to help her defeat the villain. Another could be that he gets injured because of some sort of betrayal within the superhero community, and has to deal with the physical and emotional pain.
Well, in this kind of fanfiction, when a character is injured, it can change the whole dynamic. Say Chat Noir is injured. This might make Marinette worry more about his safety in and out of the hero guise. It can also be a way to explore how the miraculous powers might be affected by an injury, like if the injury somehow weakens their abilities.
You can try searching on fanfiction websites like Archive of Our Own (AO3). There are a lot of Miraculous fanfictions there, and you can simply type in 'Chat Noir injured' in the search bar to find relevant stories.
One possible plotline could be that he's tricked by a powerful villain. Maybe the villain uses some dark magic to cloud Chat Noir's judgment. For example, they could make him believe that Ladybug has betrayed him, so in his anger and confusion, he turns evil. He might start using his powers for wrongdoings instead of protecting Paris.
Chat Noir might save the fanfiction by using his charm and charisma to inspire the writers. He could visit the authors in their dreams and give them new ideas, thus saving the fanfiction from being dull or unfinished.
One way is that he could use his super - senses to detect any flaws in the fanfiction's plot. Then, he can somehow communicate with the writer (maybe in a magical way) to suggest improvements. For instance, if there's a lack of action in the story, he can inspire the writer to add some of his signature acrobatic fight scenes.
One interesting idea could be exploring different alternate universes where Ladybug and Chat Noir have different relationships. For example, in some fanfictions, they might have to deal with their identities being revealed in a more complex and emotional way compared to the original show. Another idea is the exploration of their powers in new and unique situations that the show hasn't covered yet.
How about a fanfiction where there's a new villain in Paris who has the power to nullify the Miraculous? Ladybug and Chat Noir would have to find a way to regain their powers or find new ways to fight this powerful enemy without relying on their usual abilities.