One plot idea could be that they face challenges from their families at first. Maybe Miley's family has certain expectations for her future and is shocked by the pregnancy. Another could be that they struggle to balance their studies or careers with the upcoming baby. For example, Oliver has an important project at work that he's worried he won't be able to complete in time. They could also go through a phase where they have different ideas about how to raise the baby, like Miley wants a more natural approach while Oliver is more into modern parenting methods.
In the fanfiction, it could be that the kiss was a mistake. They were both looking for someone else in the dark and accidentally kissed. But then, they find that there's an unexpected spark between them. They then have to deal with the consequences, like how to face their real intended partners and also their growing feelings for each other.
Perhaps there's a villain who targets Felicity because of her pregnancy. This villain could see the baby as a way to get back at Oliver. So, Oliver has to go to great lengths to keep Felicity hidden and safe. Meanwhile, Felicity could be using her intelligence to find a way to outwit the villain from her hiding place, all while dealing with the physical and emotional changes of pregnancy.
One idea could be that they discover the pregnancy during a mission. Maybe they're on a dangerous quest and Sara starts feeling unwell. It turns out she's pregnant, and they have to quickly figure out how to protect the baby while still completing their mission. Another plot could be that they initially struggle with the idea of becoming parents, given their dangerous lifestyles. They might worry about bringing a child into a world full of threats. A third idea is that their friends find out before they do, and there are some comical misunderstandings and attempts to break the news to them in a gentle way.
A really engaging plot might be that the pregnancy is the result of some sort of magical or alien influence. They initially struggle to accept it, but as time goes on, they start to embrace the new life coming. Their friends and allies might have mixed reactions, some being overjoyed while others are worried about how it will affect their superhero status. This could lead to a lot of character development and interesting relationships within the fanfiction.
Perhaps in the fanfiction, Hermione and Oliver are from different social classes in the wizarding world. The pregnancy makes them face the prejudices and expectations of their respective backgrounds. For example, Oliver might be from a pure - blood family with certain traditions, and Hermione being a Muggle - born, they have to deal with the reactions of his family. They could also have a journey where they explore different magical parenting techniques and meet other magical families who help or hinder them in their path to becoming parents.
One idea could be that they face challenges in their relationship while Laurel is pregnant. Maybe Oliver is worried about his vigilante life affecting their unborn child. Another could be that they discover some sort of mystery related to Laurel's pregnancy, like a new threat in the city that targets pregnant women. A third plot idea might be that they have to deal with family reactions to the pregnancy, some being happy and others being worried about their future.
A common theme is the struggle between their personal dreams and the new reality of having a baby. For example, if they had dreams of traveling the world or pursuing certain careers, those might have to be put on hold. Family support or lack thereof is also a theme. Whether their families are there for them or not can greatly affect their pregnancy journey. Additionally, the theme of fear is often present. They are likely to be afraid of the unknowns of pregnancy, childbirth, and raising a child.
A possible plot is that Felicity discovers she's pregnant at a very inconvenient time, like right in the middle of a major battle plan against a big villain. This could lead to a lot of internal conflict for her and Oliver as they decide whether to continue with the plan or focus on the pregnancy. Also, they could face challenges in preparing for the baby, such as finding a safe place to live considering their dangerous enemies.
Well, a plot could revolve around Felicity having a difficult pregnancy. Oliver then has to balance his duties as the Green Arrow and being a supportive partner. They could also have a story where they are trying to prepare for the baby's arrival while dealing with a new villain in Star City. This villain could be targeting pregnant women, making Felicity a prime target. So, Oliver has to stop the villain while also taking care of Felicity.
Maybe Oliver and Lily are in a story set in a small town. The news of Lily's pregnancy spreads quickly. They could face judgment from the community. However, they decide to use this as an opportunity to show everyone that they are mature and can handle this. They start preparing for the baby together, painting the nursery and taking parenting classes, and in the process, their relationship deepens.