Well, one possible plot could be that Danny and Sam are on a quest to save their town from an otherworldly threat. They could be exploring old, haunted buildings together, looking for clues. Danny uses his ghost - fighting abilities while Sam uses her knowledge of the occult and her wits. Along the way, they might have some friendly arguments about the best way to approach the situation, but in the end, they work together and succeed in saving the day.
Perhaps Danny and Sam discover a new type of ghost that is not like the ones Danny usually fights. This ghost is more of a mystery and seems to be connected to an ancient legend. They embark on a journey to figure out the origin of this ghost. They interview old people in the town, search through old books in the library. As they get closer to the truth, they also learn more about each other and their own strengths and weaknesses.
One possible plot could be that all the ghosts in the Danny Phantom world decide to be on their best behavior for the wedding. They might offer unique gifts, like a ghostly flower arrangement that never wilts. Danny and Sam would have to deal with the normal wedding jitters, but also the added stress of keeping the peace between the living and the dead guests.
One possible plot could be that Danny and Sam decide to spend Christmas helping the ghosts who are usually left out during the holiday. They could use Danny's powers to bring some holiday cheer to the Ghost Zone. For example, they might organize a little Christmas party with ectoplasm - made decorations and treats that ghosts can enjoy.
Well, one aspect could be the role of their superpowers in the pregnancy. Perhaps Sam's pregnancy has some unexpected effects on Danny's powers or vice versa. And the story could also delve into how they prepare for the new arrival in a world full of ghosts and other supernatural elements.
The plot could involve some sort of mystery related to the pregnancy. Like, there could be a ghostly force that is either helping or hindering the pregnancy. And they have to figure out what it is and how to deal with it. Also, their friends like Tucker could play important roles in supporting them.
One possible plot could be that Danny has finally defeated all the major ghosts threatening Amity Park. With the town at peace, he realizes his true feelings for Sam. They start planning a simple wedding. However, some of Danny's ghost enemies, not fully defeated, try to disrupt the wedding to get revenge on Danny. But with the help of their friends Tucker and Danny's family, they manage to fend off the attacks and have a beautiful wedding in the park, surrounded by their loved ones.
One possible plot could be that their daughter inherits Danny's ghost powers. She might struggle to control them at first, just like Danny did. Sam and Danny would be there to guide her, teaching her about the importance of using her powers for good. There could be a new villain in town who targets their daughter because of her unique half - ghost nature. And she has to learn to use her powers and the knowledge passed down from her parents to defeat the villain.
Well, perhaps in the future, Danny and Sam get married. They have a family and are trying to live a normal life, but their past as ghost hunters keeps coming back. Their kids start to show signs of having special powers or an interest in the supernatural. Sam and Danny then have to teach them about the world of ghosts while also protecting their family from old enemies that resurface.
In some fanfictions, it could happen during a moment of vulnerability. For example, if Sam gets hurt while they're on an adventure, and Danny is really worried about her. As she recovers, Danny realizes how much she means to him and they share a kiss. Or maybe they get stuck in a ghost - created alternate dimension where they think they might not get out. In that desperate situation, they confess their feelings and kiss for the first time.
Well, in this fanfiction, it could be that Danny's change to Dark Dan is triggered by some extreme event. Sam, being in love with Danny, is determined to save him. She might face a lot of challenges like dealing with Dark Dan's new powers and his more malevolent personality. She could try to find a way to reverse the transformation by looking into ancient lore or seeking help from other characters who knew Danny before.
The plot could center around the emotional journey. Sam may experience a range of emotions from joy to fear. Danny could be there to comfort and encourage. They might also face difficulties such as financial concerns. For example, they'll need to think about buying baby stuff, finding a bigger place if needed. And as the pregnancy progresses, they'll have to start thinking about Dani's future, like education and what kind of life they want to provide for the child.