What are some interesting plot ideas for a Miraculous Ladybug crossover fanfic?

Another plot could involve Anna getting a Miraculous. She could be a new hero in Paris, teaming up with Ladybug and Chat Noir. They might face a villain who has the ability to create eternal winter like in Frozen, and Anna's experience with dealing with Elsa's winter could come in handy. Also, the cultural differences between Arendelle and Paris could add some interesting twists to the story.

One idea could be an OC who has a unique Miraculous that is related to a different aspect of nature, like a firefly Miraculous. The OC could struggle with controlling its powers at first. Another idea is an OC who is from a different country and brings in new cultural elements to the Miraculous world. For example, they might have a special fighting style based on their native martial arts.

One idea could be exploring how Marinette balances her superhero duties with her pregnancy. Maybe she has to be more cautious during battles, and her partner Chat Noir has to be extra protective. Another plot could involve her friends and family finding out. Some might be overjoyed while others could be worried about how she'll handle it all.

One idea could be that the cats in the Miraculous Ladybug world are somehow affected by a new curse that makes them lose their agility. This would cause problems for Cat Noir as he tries to fight villains. Another could be a curse that makes all the cat - related items in Paris turn into something else, like the catacombs becoming a maze of thorns, and Ladybug and Cat Noir have to find a way to reverse it.

One plot idea could be that Ladybug and Chat Noir have a huge fight due to a misunderstanding, which leads to a 'hate' phase. But as they face a powerful villain alone, they realize they need each other and slowly start to rekindle their friendship and the underlying love. For example, Chat Noir could be wrongly accused by Ladybug of working with a new villain. As they work separately to defeat the villain, they see the struggles each other faces and remember why they were partners in the first place.

Maybe Marinette goes to a summer art camp and Adrien is also there. They work on a big art project together and their feelings for each other grow as they share their creativity and passion for art. During the summer nights, they stargaze and have deep conversations.

One idea could be that Marinette from Miraculous Ladybug discovers she is also a princess in the world of The Princess Diaries. She has to balance her superhero duties with princess training. For example, she might use her Ladybug powers to make her princess lessons more fun or to solve problems in the palace that normal methods can't handle.

One idea could be a story where the Peacock Miraculous has a unique malfunction that causes it to create unexpected akumas. For example, instead of creating the usual villains, it creates akumas that have the power to spread positive emotions but in a chaotic way that still disrupts Paris. Another idea is a fanfiction where the holder of the Peacock Miraculous has to team up with Ladybug and Chat Noir to fight against an ancient evil that is specifically drawn to the power of the Peacock. This could involve exploring the history of the Miraculous and its connection to this new threat.

One idea could be a crossover with another superhero universe like the Avengers. Ladybug could team up with Iron Man, sharing their high - tech gadgets and different combat styles. It would be exciting to see how they interact and face common enemies.

One idea could be Multimouse having to team up with an unexpected ally, like a villain who has a change of heart for a short time. Another could be Multimouse getting lost in an alternate dimension and having to find her way back while facing new challenges.