One could be a time-travel adventure where the protagonist has to fix historical mistakes. Another could be a fantasy world where magic is forbidden but secretly practiced.
Perhaps the OC was sent to spy on Frieza but instead falls in love with him. The pregnancy then becomes a complication as their respective races have different views on inter - species relationships. This could create a lot of drama and tension in the fanfiction, with both characters having to fight for their love and the future of their unborn child.
Another idea is that the Ladybug characters end up in the RWBY world. They would be shocked by the Grimm and the more dangerous environment. Ladybug and Cat Noir could team up with RWBY teams to fight off the Grimm. Along the way, there could be exchanges of combat techniques. Ladybug could teach RWBY characters some of her acrobatic moves, while the RWBY characters could show them how to handle different types of weapons.
One idea could be to explore the emotional turmoil Kagome experiences. She might be conflicted between her feelings for Inuyasha and this unexpected situation with Touga. The story could focus on how she copes with the pregnancy in a world full of demons and magic, and how the other characters react to this news.
The OC could be from a far - off land in Remnant that Ozpin has little knowledge of. When they join Ozpin, they introduce new concepts and fighting styles. For instance, their land might have a different way of using Dust, and they share this knowledge with Ozpin's group. This not only helps in battles but also in the research and development of new weapons and strategies. The OC's journey with Ozpin could also involve uncovering ancient secrets about Remnant that were long forgotten, and together they strive to use these secrets to gain an edge against Salem.
One idea could be that Lucy discovers she's pregnant during a difficult time in the magical world. Gray is initially shocked but then becomes very protective. They might face challenges from their guild mates who are worried about how this will affect their ability to go on missions.
A third possibility is that the pregnancy has some sort of magical or unexpected origin. Maybe it was a result of a unique event, like a comet passing overhead that had some sort of strange effect on them. This leads to the pregnancy, and as it progresses, Esme starts to develop new powers or abilities. Carlisle is both fascinated and concerned, and they both have to figure out how to handle these new developments while also ensuring the safety of their unborn child.
A possible 'Walking Dead Game' dream fanfiction storyline could involve a character's dream that predicts future events in the game world. However, the events in the dream are not clear - cut, and the character has to decipher them. As they try to figure out what the dream means, they make choices that either lead them closer to or further from safety. This could add an element of mystery and suspense to the fanfiction.
One idea could be that they accidentally find out they're expecting during a mission together. Maybe they had a one - time moment of closeness before and now have to deal with the unexpected pregnancy. This could lead to a lot of drama as they both have important roles in their village and their relationship has always been complex.