Well, a possible plot for the Ben and Mal baby fanfiction could be centered around the baby's first birthday. All of Auradon is invited, but an unexpected guest shows up, someone from Mal's past who isn't too happy about the union between Ben and Mal. This person tries to cast a spell on the baby, but the combined love and magic of Ben and Mal protect their child. Also, the baby could start showing signs of being able to communicate with animals, which is a big deal in Auradon as it might mean a new era of harmony between humans and animals.
One idea could be that Mal struggles with her new role as Ben's girlfriend and future queen. She might feel pressured by the expectations of Auradon society. Another could be a story where an old enemy from the Isle of the Lost tries to break them apart by causing misunderstandings between Mal and Ben.
One idea could be Ben trying to introduce more modern ideas to the Isle of the Lost while Mal is hesitant as she fears it might disrupt the fragile peace. For example, he wants to start a school exchange program but Mal is worried about old grudges resurfacing.
A cool fanfiction could be Mal and Ben swapping powers for a day. This would lead to all sorts of comical and also challenging situations. For instance, Mal would have to deal with the responsibilities of being a king - like making important decisions in court - while having Ben's more 'goody - two - shoes' power. And Ben would be on the Isle of the Lost, trying to use Mal's magic in a place where it's not always welcome. Or a story where they go on a secret adventure away from Auradon, just the two of them, and discover a hidden land that has its own set of rules and magic, and they have to adapt quickly to survive.
You could write a fanfiction where Ben and Mal get transported to an alternate dimension. In this dimension, their roles are reversed. Mal is the one in charge of Auradon and Ben is from the Isle of the Lost. They have to figure out how to get back to their own world while also learning about each other in this new dynamic.
One idea could be that they face challenges from an old enemy who tries to disrupt their wedding. Maybe the enemy casts a spell that makes everyone forget who they are supposed to be at the wedding, causing chaos. Another plot could involve Mal having doubts about being a good queen and how that affects their relationship before the wedding. They have to work through these issues together and prove their love can overcome all.
In a fanfiction about them as babies, there could be a magical event that only they seem to be aware of. Maybe a tiny fairy visits them in their cribs and gives them a special gift that will influence their lives later. Mal might get a small vial of magic that she'll use in the future, and Ben could get a tiny crown charm. This would be a way to tie their baby story to their grown - up roles in the Descendants world.
One idea could be that Ben and Mal play a light - hearted prank on their friends in Auradon. They could tease them by pretending there's a new, super - strict rule coming from the palace. For example, they might say that all magic - using VKs have to have a curfew for their magic use only. Their friends would be all in a panic until Ben and Mal reveal it was just a joke.
The plot might involve Ben and Mal teasing a new student from the Isle of the Lost. They pretend to be very strict Auradonians and give the new student all these 'rules' that are really just made - up. The new student gets really confused at first. But as the story progresses, Ben and Mal reveal it was all a joke to make the new student feel welcome. They then become good friends and the new student joins in on their teasing games with the other students in Auradon.
Often, a plot point could be the inclusion of characters from both Mal's and Ben's worlds who might not initially get along but come together for the wedding. For example, some of Mal's friends from the Isle might be a bit rough around the edges compared to Ben's Auradon friends.
They could have a pregnancy journey filled with self - discovery. Mal might discover new sides of herself as she prepares to be a mother. Ben could also learn a great deal about responsibility. For instance, he might start taking more precautions to ensure the safety of Mal and the unborn child, like increasing security around the castle.