Well, a cool fanfiction could be about a secret society on Planet Vegeta that had different powers or knowledge compared to the mainstream Saiyans. For example, they might have had a way to control their Great Ape form without the need for a full moon. Or it could be a story where a young Saiyan on Planet Vegeta discovers a prophecy that could change the fate of the Saiyan race, and they have to fight against the established order to make it come true.
One idea could be exploring the daily life on Planet Vegeta before its destruction. What kind of culture, traditions, and hierarchies existed there? Another could be a story about a Saiyan who was sent away from Planet Vegeta just before its destruction and their journey to return and find out what really happened. Maybe there could also be a fanfiction about the Saiyans' relationship with other races in the universe from the perspective of Planet Vegeta.
Well, in a lot of Dragon Ball Z fanfics, the idea of Planet Vegeta still being around is really interesting. It could open up so many new storylines. For example, if Planet Vegeta was still around, Saiyans might not be scattered all over the universe. Vegeta might have grown up there in a completely different environment. There could be political intrigue on the planet between different Saiyan clans that we never got to see in the original story. And of course, there would be a whole different dynamic with Frieza if the planet was still intact.
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.
One interesting plot could be about Vegeta trying to understand Earth's customs for Bulma's sake. For example, he might struggle with things like birthday parties or family holidays. Another plot could be Bulma inventing a new device that gives Vegeta a new power boost, but it has some unexpected side effects on his Saiyan pride. Or it could be a story where they go on a vacation together to a new planet and face various challenges there.
Vegeta, of course. His backstory related to Planet Vegeta is full of potential. You could explore his early life, his relationship with his father, and how the destruction of his home planet shaped him. Bardock is also interesting. His premonition about the destruction of Planet Vegeta could be further delved into. And Nappa, his loyalty to Vegeta and what his life was like on the planet before they became Frieza's minions.
Perhaps a fanfiction where Vegeta and Goku get transported to an alternate universe. In this universe, their roles are reversed, and they have to adapt to the new situation while still trying to find a way back home. They would face challenges that are unique to this new world and learn from each other in different ways.
One idea could be a story where Vegeta and Trunks train together in a new, super - intense way. They could discover a new form that combines their Saiyan powers in a unique way. For example, they might find a way to fuse their ki into a powerful energy blast that can defeat even the toughest enemies.
One idea could be that they have to team up in a new and strange way due to a unique threat. Maybe there's a villain who can only be defeated by a special combination of their powers that they discover through their new 'mate' relationship. For example, they might have to combine their ki in a way they've never done before.
One idea could be that Female Goku and Vegeta have to team up to save the universe from a new and powerful enemy. They start off not getting along well, like in the original series, but as they face challenges together, they develop a mutual respect and friendship.
Another storyline might be about them going on a small adventure together. They could encounter a new threat that isn't quite big enough to involve the whole Z - Fighter crew. This would give them a chance to show their relationship outside of the main battles, like Vegeta protecting Bulla in a more personal way.
One interesting storyline could be about Vegeta trying to be a better father to Trunks in a fanfic. He might struggle with his Saiyan nature while also wanting to show love and support like a human father. Another could be a time - travel fanfic where Bulma uses her genius to create a time machine again, and Vegeta goes back in time with her for some reason, like to prevent a future threat from ever happening. And there could also be a fanfic where Vegeta and Bulma have an adventure in a new, uncharted part of the Dragon Ball universe, facing new enemies and discovering new powers together.