A possible plot idea is that the pregnant bump has some special magical properties. For example, it could be a source of new magic that attracts the attention of both good and bad forces. Draco and Harry then have to protect the unborn child from those who would use its power for evil. Also, they could go on a journey to find a way to ensure a safe delivery, encountering various magical creatures and obstacles along the way.
In some fanfictions, there could be a time - travel plot where Draco and Hermione from different timelines end up together and Hermione gets pregnant. This would involve dealing with the consequences of changing the timeline as well as their relationship dynamics.
In a post - war wizarding world, there is a new potion that has some unexpected side effects. Draco and Hermione accidentally consume it. As a result, Hermione becomes pregnant. They are both shocked and confused. But as they navigate through this strange situation, they find that they have more in common than they thought. They start to bond over their shared experiences in the war and their hopes for the future of their child.
One idea could be that Harry and Draco find a magical toy that has the power to transport them to different wizarding worlds. They have to work together to find their way back home. Another could be that they both inherit a collection of enchanted toys from an old wizard, and they must figure out how to use the toys to solve a mystery in Hogwarts.
One idea could be that Harry and Draco find an abandoned magical baby and they have to work together to take care of it. This forces them to put aside their differences and learn about each other in a new way.
One idea could be a story where Harry, Draco, and Severus are forced to work together on a dangerous mission to save Hogwarts from a new dark threat. They start off distrusting each other but gradually learn to respect and rely on one another.
One idea could be a story where Draco, Harry and Hermione are forced to work together on a special magical project for the Ministry. They start off hating each other but gradually come to respect one another's skills. Another plot could involve them getting trapped in an alternate magical dimension where they have to rely on each other to find their way back. Maybe Draco has some knowledge of the dark magic that created the dimension, Harry has his Gryffindor courage to lead them through dangerous areas, and Hermione uses her vast knowledge to figure out how to break the spell that trapped them.
One idea could be that they are forced into an arranged marriage in a post - war world where they have to put aside their old grudges. Pansy discovers she's pregnant, and they both struggle to adapt to the new situation. Harry, being the hero he is, tries to protect Pansy and the unborn child from any threats.
Well, perhaps in the fanfiction, there is a prophecy that their unborn child will be the key to a great change in the wizarding world. This makes them a target for both good and bad forces. They struggle with the decision of whether to keep the baby's existence a secret or to embrace it publicly. And as Hermione's pregnancy progresses, they face many challenges, both physical and emotional, as they prepare for parenthood in a world full of magic and danger.
One idea could be exploring how they adjust to the news. Maybe Ginny has to cut back on her Quidditch training, and they deal with the excitement and nervousness of impending parenthood. Another plot could involve them sharing the news with their friends and family, like Ron's hilarious reactions.
Well, perhaps Draco, in the role of Merlin, has a special connection to the magical creatures that he uses to help Harry. Harry, as Arthur, is trying to unite the different factions of the wizarding world. Draco's knowledge of magic, similar to Merlin's, allows him to create magical artifacts or spells that assist Harry in his quest for unity. And there could be a love story involved too, like Guinevere and Arthur, but in the context of the wizarding world with some other character and Harry.