Perhaps the fanfiction could focus on how the baby's Saiyan heritage affects its growth and development. For example, it might have a very strong appetite like Vegeta, or it could show signs of intense determination early on. Also, it could be interesting to write about how Bulma uses her scientific knowledge to ensure the baby's well - being while also dealing with Vegeta's Saiyan parenting ideas.
A really interesting plot could be that an old enemy of Vegeta's resurfaces and targets Baby Trunks. Vegeta is determined to protect his son at all costs. Bulma, on the other hand, uses her intelligence to come up with a plan to defeat the enemy. There could be a lot of action scenes with Vegeta fighting, and also some heart - warming moments between the family members as they support each other through the crisis.
A fanfiction could focus on a day in the life of the family. Bulma could be working on some new invention in her lab, Vegeta is training hard outside, and Baby Trunks is getting into all sorts of cute mischief. Then, something unexpected like a small alien invasion occurs near their home, and they all have to work together to deal with it.
Perhaps a plot where Bulma creates a new invention that goes wrong and accidentally gives Vegeta some strange powers. They then have to figure out how to reverse it while also dealing with their feelings for each other. It could involve some comical situations as Vegeta tries to control these new powers and Bulma tries to help him, all while their love story unfolds.
Perhaps a fanfiction where Bulma, out of curiosity, tries to understand the cultural and biological importance of Vegeta's tail. She starts documenting it, and Vegeta is initially hesitant but then realizes it's a way for her to get closer to his Saiyan heritage. This could lead to some really sweet and funny moments between them as she asks all sorts of questions about it and he tries to answer them in his gruff way.
Well, a story could be set during a time when Bulma is pregnant with their second child. She's having a difficult pregnancy, and Vegeta has to learn to be more supportive and understanding. This could lead to some really sweet and also some tense moments between them. They could also have an adventure together during this time, like trying to find a special herb on a far - off planet that's supposed to help with the pregnancy.
One plot idea could be that Vampire Vegeta has to protect Bulma from other vampires who see her as a valuable asset due to her intelligence. He struggles with his vampiric instincts while growing closer to her.
A great plot could be that Vegeta and Bulma go on a journey together to a new planet. On this journey, they face various challenges like harsh environments and strange creatures. Through these shared experiences, they start to see each other in a new light. Vegeta could show his vulnerable side to Bulma when he gets injured protecting her, and Bulma could use her intelligence to save them both from a dangerous situation, leading to their relationship deepening.
One challenge could be protecting the baby from their enemies. Vegeta has made many foes over the years, and they might target the baby. Also, Vegeta's Saiyan nature might make him push the baby too hard in training, while Bulma wants a more relaxed approach. This difference in parenting styles could cause some friction between them.
One idea could be a story where Vegeta and Bulma go on an adventure to a new planet together. They face various challenges there, which test their relationship and their individual strengths. It could show how they rely on each other in unexpected situations.
One idea could be a story where Bulma and Vegeta go on a secret adventure together to find a new power source for Capsule Corp. Another could be a plot where they have to deal with an alien threat specifically targeting their family. Maybe a story about how they first fell in love from Vegeta's perspective, including his inner thoughts as he slowly warmed up to Bulma.