In a Harry Potter and Carlisle Cullen mpreg fanfiction, the plot could be centered around a prophecy. A prophecy that foretells of a union between a wizard and a vampire resulting in a special child. Carlisle and Harry find themselves in the middle of this prophecy. As Carlisle is pregnant, they have to protect themselves and the unborn child from those who would seek to use the child for their own dark purposes. This could involve battles, alliances, and a lot of self - discovery for both characters as they navigate this new and unexpected situation.
The plot might start with Carlisle noticing strange symptoms which are initially dismissed as something else. Harry, who has a sixth sense for things that are not right, realizes what's going on. They then embark on a journey to understand this phenomenon. They could travel to different magical places, like the Forbidden Forest in Harry's world or some ancient vampire lairs, in search of answers. And as the pregnancy progresses, they have to deal with the impending arrival of the baby and all the implications it has for their two very different worlds.
One possible plot could be that a dark magic experiment gone wrong causes Carlisle to become pregnant. Harry, with his knowledge of various magics from the wizarding world, tries to find a way to reverse it or at least ensure a safe pregnancy. Along the way, they face opposition from both the vampire coven and some in the wizarding world who see this as an abomination.
Regarding the Harry Potter and Carlisle Cullen mpreg fanfiction, it might seem quite far - fetched at first. But fanfiction is all about taking the known elements of different universes and twisting them in new ways. This could lead to some really emotional and thought - provoking stories. There could be a lot of internal struggle for Carlisle, as a vampire who is now facing a very human - like experience. And Harry could bring his own experiences of growing up in a difficult situation in the wizarding world to help Carlisle through this. It could also be a story that challenges the readers' perceptions of gender and reproduction in these fictional worlds.
One possible plot could be that there is a dark magic threat that endangers Carlisle Cullen. Harry Potter, with his knowledge of magic and experience in fighting dark forces, somehow travels to the Twilight universe and uses his spells to protect Carlisle from the threat.
Another common theme is the concept of identity. Harry is known as 'The Boy Who Lived' and has to deal with his fame and destiny. Carlisle, on the other hand, has to balance his vampiric nature with his more human - like morals. Fanfictions may delve into how they come to terms with their identities, and how being in each other's presence might affect or change their self - perception. There could also be themes related to family, as both Harry and Carlisle have complex family situations in their original stories.
One interesting plot idea could be that Harry Potter, while exploring the wizarding world's secrets, stumbles upon a hidden portal that leads him to the world of the Cullens. There, Carlisle Cullen takes an immediate interest in Harry, seeing his unique magical abilities and the burden he carries. They could then form an unlikely alliance to face a common threat that endangers both the wizarding world and the vampire realm.
One interesting fanfiction could be about Carlisle Cullen visiting Hogwarts. Maybe he goes there to share his knowledge of medicine with the Hogwarts staff. In this story, he could interact with characters like Dumbledore, and they could exchange ideas about magic and vampiric abilities.
Often, themes in such fanfictions might revolve around relationships. Given the mpreg aspect, there could be a focus on how the characters deal with an unexpected pregnancy. For example, how Harry or Edward handle the physical and emotional changes, and how their relationships with other characters are affected. There could also be themes related to acceptance, both of the situation and of the new life that's coming.
Common themes often include the exploration of their personalities. Carlisle is a very old and wise vampire, while Harry is a young wizard with a lot of courage. Fanfictions might focus on how these traits play into their relationship. Also, the idea of secrecy and the challenges it brings in their relationship. Since they come from different worlds, they may need to keep their relationship a secret, which can create a lot of drama and tension in the story.
One plotline could be that Harry discovers the existence of vampires through Carlisle. Since Carlisle has a different view on life compared to most vampires, he could teach Harry about the vampire world and how not all of them are evil. This could lead to Harry having a new perspective on creatures that are often seen as dark in the wizarding world.
One possible plotline could be how Harry and Carlisle meet in a world where the two fictional universes collide. Maybe they meet during a magical event that draws vampires and wizards together.
They could interact in a way where Carlisle imparts his knowledge of self - control and morality to Harry. Given Carlisle's long existence as a vampire, he has a different view on life and death compared to Harry. This exchange of ideas could lead to some interesting character development for Harry. For instance, Carlisle might share stories of his past mistakes and how he overcame them, which could inspire Harry in his own battles against evil.