Well, perhaps in the fanfiction, Launch could be transported to a parallel universe on Planet 16. In this universe, the rules of Dragon Ball are a bit different. She might find herself with new abilities or facing different versions of her friends and foes. For example, Vegeta could be a king in this universe and Launch has to figure out how to deal with his different personality while also trying to find a way back to her own universe.
A great plot idea for this fanfiction could be that Launch, while on Planet 16, stumbles upon a hidden prophecy. This prophecy foretells of a great danger that will befall Earth if she doesn't complete a series of difficult tasks. Along the way, she teams up with some of the local inhabitants of Planet 16 who have their own unique powers and personalities. They face many challenges together, and Launch has to learn to trust them and use her own skills in new ways to fulfill the prophecy and save Earth.
A cool concept could be that the Dragon Balls are launched during a time of peace in the Dragon Ball world. But a mysterious force starts to corrupt the wishes made with the Dragon Balls, causing chaos. So, the Z - fighters have to figure out what's going on and stop this new threat while also dealing with the consequences of the corrupted wishes.
In this fanfiction, an interesting idea could be the introduction of new races. There could be a race that has the ability to manipulate energy in ways the Saiyans and other known races can't. They might have a unique power - sharing ability, where they can combine their powers with others to create a super - being. This could lead to some really epic battles and alliances in the story. Also, the story could play with the concept of time travel in a new way. Maybe the characters have to go back in time to prevent an even greater evil from emerging in the future.
A possible plot is that the reincarnated person has a special power from their previous life that doesn't exist in the Dragon Ball world yet. Maybe it's a unique form of magic. This new power attracts the attention of both the heroes and the villains. The Z - fighters might be curious and want to learn from it, while the villains see it as a means to gain an advantage over their enemies.
A cool plot could involve a new villain who is able to control time in a different way than Cell or the Supreme Kai of Time. This villain uses time - based attacks and defenses, and the Z - fighters have to learn new techniques to combat it. In this fanfiction, the RPG elements could include leveling up their time - related skills. Also, a story about a character who is half - Namekian and half - human trying to find their place in the Dragon Ball universe could be really engaging.
Some fanfictions explore Bardock's connection to the Super Saiyan legend in more depth. Maybe he had a premonition or some sort of hidden knowledge about it that he was trying to pass on. This can lead to really complex and engaging storylines that add new layers to the Dragon Ball lore.
One idea could be that after the defeat of a powerful enemy, Goku accidentally ends up in a parallel dimension where he meets multiple female characters from different eras of Dragon Ball. They all develop feelings for him due to his heroic nature. Another plot could be that Vegeta, in an attempt to outdo Goku, gets involved in a situation where he has a harem of his own, but he's constantly struggling to understand their emotions as he's so focused on training. A third idea is that a new female Saiyan arrives on Earth and she has a special power that attracts many of the male Dragon Ball characters, leading to a complex web of relationships and a harem - like situation.
One idea could be that the reincarnated character has knowledge of all the Dragon Ball series in their past life. So they start training in a unique way early on, like combining different fighting styles from different sagas. For example, they might mix Goku's Kaioken with Vegeta's Galick Gun at a very young age, which surprises everyone in the Dragon Ball world.
Another interesting plot could be a what - if scenario where Yamoshi teams up with the modern Z - fighters. This would bring a whole new dynamic as he has his own set of skills and values from his era.
One idea could be a story where the next generation of Saiyans discovers a new form that combines the power of Super Saiyan with a long - lost ancient Saiyan ability. Another could be about a character from a different universe in the Dragon Ball multiverse coming to Earth during the 'Dragon Ball Generations' time and causing chaos. Maybe a story where the new generation has to deal with a threat that is immune to ki attacks and they have to find a non - traditional way to fight it.
One idea could be that a new villain creates a zombie virus that specifically targets Saiyans. Goku and the gang have to fight their zombified Saiyan friends while also trying to find a cure. Another could be that the Dragon Balls are somehow corrupted and start resurrecting people as zombies. They then have to figure out how to reverse this before the zombie horde becomes too powerful.