One idea could be that Lucy and Wyatt find out they're having a baby with special time - traveling abilities. It could add a whole new dimension to their adventures as they try to protect the baby from those who might want to use its powers.
One idea could be that the baby has a special power. For example, the baby might be able to communicate with magical creatures in a way that no one else can. This could lead to all sorts of adventures as Lucy and Caspian try to protect the baby from those who might want to use the power for evil.
One interesting twist could be that someone from their past or future tries to manipulate the pregnancy for their own gain. This person could be trying to change the course of history through the baby. Lucy and Wyatt would then have to fight to protect their unborn child and the future.
One idea could be that Natsu and Lucy accidentally end up taking care of a baby dragon. Natsu would be excited to teach it fire - breathing tricks while Lucy would be more focused on keeping it safe and fed. Another plot could involve a magic spell gone wrong that turns them into babies themselves, and they have to figure out how to reverse it while in this state. It could also be a story where they find a lost baby in the forest during one of their quests, and they decide to raise it together, which would show their growth as characters in terms of responsibility.
Rittenhouse could be antagonists. They might see the baby as a tool or a threat to their plans for controlling time. They could try to kidnap the baby to use its potential powers for their own evil purposes.
Perhaps in the fanfiction, they kiss at a grand ball. Lucy is dressed in a beautiful gown and Wyatt can't resist her charm. It's a very romantic and fairytale - like moment. They might be surrounded by other characters who are either shocked or happy for them.
A plot idea could be that Desmond and Lucy are on a mission to find a hidden Piece of Eden. Along the way, they face many challenges and have to rely on each other's strengths. Maybe Lucy is the one who is more knowledgeable about the historical context and Desmond uses his Eagle Vision to navigate through dangerous areas. They could also face internal conflicts within their own organizations that threaten their mission and their relationship.
One idea could be that Lucy's pregnancy is unexpected and she has to deal with the reactions of her friends and family. Some might be overjoyed while others are worried. Another could be a story where the father of the baby is a mystery and Lucy goes on a journey to find out who it is. Maybe she discovers some secrets about her past relationships along the way.
Perhaps in the fanfiction, Lucy gets lost in a magical maze that appears in Narnia. Aslan has to enter the maze to find her. While in the maze, they encounter strange magical beings and challenges. Through this experience, their bond deepens, and they emerge with a new understanding of their roles in Narnia.
One idea could be that Lucy and Hibiki are from different worlds but are brought together by a magical accident. They then have to team up to find a way back to their respective homes while facing various challenges along the way.
A possible story could be that they planned for the pregnancy. They've been through so much together in their adventures that they feel ready to start a family. Their pregnancy journey could be filled with small, sweet moments like Wyatt talking to the baby bump at night, and Lucy writing letters to their future child about their time - traveling experiences.