A more complex plot could be that there is a prophecy about a union between a half - ghost and a magical being like Star. Danny and Star initially don't believe it, but as they keep crossing paths and helping each other out, they start to see that there might be something more to it. However, there are forces that oppose this union, thinking it will disrupt the balance between the human world, the magical world, and the Ghost Zone. So they have to fight against these forces while also coming to terms with their own feelings.
One idea could be that Danny and Ember are forced to team up against a new powerful ghost enemy. During their time together, they start to see different sides of each other and feelings begin to develop. Another could be a time - travel plot where Danny goes back in time and meets a younger Ember, changing the course of their relationship. Or perhaps they get trapped in a dimension where they have to rely on each other for survival, and that closeness leads to love.
The OC could be a detective - like character who is investigating strange disappearances in Amity Park. Danny and Star get involved because they suspect ghosts are behind it. The OC doesn't believe in ghosts at first, but as they start to work together, they realize that there are things beyond their understanding. Danny has to be careful not to reveal his identity as Phantom too soon. As they dig deeper, they find out that there is a powerful ghost who is kidnapping people to use their energy for a dark ritual. The three of them must find a way to stop this ghost and rescue the captives.
One idea could be that Danny discovers a new ghostly power that he uses to take revenge on a group of bullies who have been tormenting his friends. He could use his intangibility in a creative way, like sneaking into their lockers and making their things disappear.
One idea could be Danny Fenton having to deal with a new ghostly enemy that can manipulate time, making his double life as Danny Phantom even more chaotic. Another could be Danny trying to balance his high school life, including exams and relationships, while also facing a ghost invasion that only he as Danny Phantom can stop. Or perhaps a story where Danny Phantom discovers a hidden power within himself that has a connection to his human side, Danny Fenton.
Another idea is a story about Danny and Star accidentally swapping powers. Danny has to deal with Star's magic while Star tries to control Danny's ghost abilities. It could be a comical yet challenging situation for both of them as they learn to adapt.
One idea could be that Danny Phantom somehow gets transported to the Star Wars universe. Maybe he uses his ghost powers to help the Jedi or the Rebels. For example, his intangibility could be useful in sneaking past enemy defenses.
One idea could be that Danny gets an illness that affects his ghost powers. For example, he might start losing control over his intangibility or invisibility. This could lead to some really comical or dangerous situations. Another idea is that his friends try to find a cure for his strange ghost - related illness while also keeping it a secret from the town.
Well, a great plot for Danny Phantom future fanfiction could be that Danny discovers a way to travel to different dimensions in the Ghost Zone. In these dimensions, he finds versions of himself with different powers and personalities. He then has to figure out how to use this knowledge to save his own dimension from a powerful ghost that is slowly draining the life force of the living world. It could involve a lot of self - discovery for Danny as he learns from his other - selves.
Maybe Ophelia has some sort of special power herself that she doesn't know about until she meets Danny Phantom. They could go on a journey to figure out what her power is and how it can be used to help the town. It would be a great way to explore both of their characters in a new light.
One idea could be that Danny discovers a new power that has been dormant all this time. Maybe it's a power related to time manipulation, which could lead to some really cool adventures where he has to fix time - related problems in the Ghost Zone or in the human world. Another plot could involve Danny meeting his future self who has come back to warn him about a great danger that is coming. This could create a lot of mystery and suspense as they try to figure out what the danger is and how to stop it.