One idea could be that Hawk Moth finally manages to get hold of both the Ladybug and Cat Miraculouses and the heroes have to find a new way to fight him, perhaps by teaming up with some of the minor characters who develop new powers. Another could be that Ladybug and Cat Noir have to travel to the future to stop an even greater threat that is related to Hawk Moth's actions in their present time.
In a Miraculous Ladybug future fanfiction, a possible plot could be the discovery of a hidden society of Miraculous holders. Ladybug and Cat Noir stumble upon this society while investigating a strange occurrence. The society has its own rules and powers that are different from what they know. They have to figure out how to integrate with this society and also use their knowledge to prevent an evil force from within the society from taking over the world. This would involve a lot of character development as they learn about new cultures and powers related to the Miraculouses.
Well, a cool plot for Miraculous Ladybug future fanfiction might be the introduction of new Miraculouses. Imagine if there were Miraculouses from different parts of the world that had unique powers. Ladybug and Cat Noir would then have to learn about these new powers and how to work with the new holders. Also, what if there was a time - travel aspect where they go back in time to understand the origin of the Miraculouses better, which in turn helps them in the future against a new villain.
One plot idea could be that Ladybug and Chat Noir see a future where Paris is in ruins because they failed to stop Hawk Moth. This would give them the motivation to find a new strategy in the present, like seeking out new allies or uncovering a hidden power of their Miraculouses.
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 that the Reverser's powers are amplified and he starts reversing not just individual actions but entire relationships in Paris. So, Marinette and Adrien's unspoken bond is reversed, making them avoid each other at all costs. Another could be that the Reverser targets Ladybug's and Chat Noir's memories of their superhero identities, causing chaos as they try to figure out who they are again while still having to fight akumas. A third idea is that the Reverser somehow manages to reverse the concept of good and evil in Paris, making the akumas seem like the heroes and the heroes like the villains, and Ladybug and Chat Noir have to find a way to reverse it back.
One idea could be that the thief has a secret noble cause. Maybe they steal to return precious items to their rightful owners who were wronged in the past. For example, an artifact was stolen from a family long ago, and the thief is trying to make things right.
One idea could be that Zombizou actually has a hidden power within her zombie state that she can transfer to Ladybug or Chat Noir to help them defeat a new super - villain. For example, she might be able to make them invisible to the villain's special powers for a short time.
One idea could be a story where the child of Ladybug and Chat Noir discovers their parents' secret identities by accident. Maybe they find a hidden Miraculous box in the attic and start to figure out what it means.
A possible plot for the Miraculous Ladybug Glaciator fanfiction is that Glaciator somehow freezes time in Paris, except for Ladybug and Chat Noir. They have to find a way to reverse the time - freeze while also dealing with Glaciator's attacks. Or perhaps Glaciator teams up with another akumatized villain, creating a more difficult situation for our heroes. Also, the fanfiction could explore the relationship between Ladybug and Chat Noir as they are trapped in this frozen - in - time Paris, and how they grow closer or face new challenges in their relationship.
One idea could be exploring the emotional aftermath for the characters after the events of Puppeteer 2. For example, how Ladybug and Chat Noir's relationship might have changed. Another could be introducing a new villain who takes advantage of the chaos left behind. Maybe a new Miraculous holder could also be introduced in the fanfiction, adding a new dynamic to the story.
One idea could be that Ladybug and Chat Noir are sent to space on a mission to stop an alien villain who is stealing energy from planets. They have to adapt to zero - gravity combat and use their powers in new ways. For example, Ladybug's yo - yo could be used to grapple onto spaceships.
Another plot could involve a school project where the students have to work in pairs. Marinette and Adrien get paired up, but there are complications due to their superhero identities. For example, they keep having to sneak away during the project to deal with akuma attacks, which makes their partner suspicious.