It could be a story about growth. Danny and Sam grow not only as individuals but also as a couple. They learn about responsibility and sacrifice. The pregnancy could also bring out different sides of their personalities. Sam might become more protective, and Danny more determined to keep his family safe. And they might have to deal with the judgment of the people in their town who don't understand their situation.
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.
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.
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.
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.
One possible plot could be that there's some sort of magical or supernatural event that causes Sam and Ember to both become pregnant at the same time. Danny might be caught in the middle, trying to figure out how to support them both while also dealing with his own ghost - fighting duties. Maybe there are complications because of the different natures of Sam (human) and Ember (ghost), and they have to find a way to ensure the pregnancies are successful.
In this fanfiction, it could be that Danny Phantom meets a Danny Phantom from a parallel fan - made story. At first, they don't trust each other. But as they learn more about each other's worlds, they realize that there are some common elements that are being threatened. It could be that a powerful ghost is trying to rewrite all the fanfic universes related to Danny Phantom. So, they must combine their strengths and knowledge to stop this from happening.
Well, perhaps in the fanfiction, Danny and Sam have been through a lot together, like countless battles with powerful ghosts. One day, Danny decides it's time to propose to Sam in a very special way. He takes her to their favorite haunt (pun intended), a place where they first discovered a powerful ghost artifact. There, he gets down on one knee and asks her to marry him. And of course, she says yes.
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.
One possible plot could be that Danny and Sam face challenges in raising their baby while also dealing with Danny's ghost - fighting duties. Maybe the baby inherits some of Danny's powers and they have to figure out how to help the baby control them.
In this fanfiction, it could start with Danny Phantom turning evil due to an experiment gone wrong. As for Sam, she has always had a special relationship with plants. The evil Danny might start to use plants as his minions, controlling them to do his bidding. Sam, seeing this, decides to take matters into her own hands. She begins to study ancient plant lore to find a way to break Danny's control over the plants. Along the way, she might face many challenges, like Danny sending his plant - minions to attack her. But she doesn't give up, as she is determined to save Danny from his evil state and restore the balance between the supernatural and the natural world.
In a fanfic where Sam is pregnant, it could be that there's some sort of supernatural influence. Maybe an enemy of Danny Phantom has a plan and Sam's pregnancy is part of it. She and Danny would then have to fight against this threat while also dealing with the physical and emotional changes that come with pregnancy. It could also explore how their friends like Tucker react and support them during this difficult time.