In a Dragon Ball alternate universe fanfiction, there could be a plot where all the Saiyans survived the destruction of Planet Vegeta. They form an alliance with Earth and together they face new threats from a different galaxy. This would change the power dynamics completely. There could also be a scenario where the Kaioshin are the main antagonists. They use their divine powers in a corrupt way, and the Saiyans and Earthlings have to join forces to stop them. And what about a universe where the concept of ki is different? Maybe it can be transferred between people like a currency, and battles are fought not just with strength but also with strategic ki trading.
Well, you could create a character who is a descendant of the Yardrats but has the ability to manipulate energy in a way that no one else can. Maybe they can turn their ki into different elements like fire or water. Also, a character that is a fusion of a Kaioshin and a demon could be really interesting. This character would have a struggle between good and evil within them and possess extremely powerful and unique abilities that are a blend of the two races.
A Kryptonian in the Dragon Ball Z universe could potentially be a very powerful addition. Their natural abilities like super strength, flight, and heat vision could make them a force to be reckoned with. However, they would also face challenges as the Dragon Ball Z world has its own power scale with ki-based powers. They might have to adapt to the different fighting styles and power sources. Maybe they could learn to use ki in addition to their Kryptonian powers, or they could find a way to combine the two in unique ways.
It can start with imagining a major event in the original story happening differently. Maybe Toothless never met Hiccup, or the dragons have different powers. That's a good starting point.
For example, Alistair could be reimagined as a mage instead of a warrior. This would change his entire backstory. He might have been hidden away in the Circle of Magi instead of being raised in the Chantry. His relationship with Morrigan would also be different, as they would both be mages with different views on magic. Another character, like Leliana, could be a bard who is actually a spy for a new, unknown organization. Instead of working for the Chantry, she has her own motives and secrets. And Varric could be from a noble family, but he has turned his back on that life to become a storyteller and adventurer in the underworld of Kirkwall.
There are also fanfictions where Android 18's actions lead to a completely different power structure in the Dragon Ball Z universe. She might help to create a more equal society between humans and androids, which changes the whole dynamic of the story. This kind of fanfiction often explores themes of equality and cooperation, with Android 18 as the catalyst for change.
One idea could be a world where the darkspawn and the elves form an alliance. They might come together out of mutual desperation, the darkspawn seeing the elves' connection to the Fade as an advantage, and the elves seeing the darkspawn's numbers as a means to gain power and protection from the other races. Another plot could involve a Dragon Age universe where magic is completely outlawed. Mages would have to go into hiding, and templars would be more like a secret police force, leading to a lot of underground resistance and intrigue. A third idea is an alternate universe where the Qunari have taken over most of Thedas. Their strict way of life would reshape the cultures and societies of the other races in ways that are both fascinating and disturbing.
No. In the original Dragon Ball series, Goku and Bulma are friends. Goku is a heroic character with a good heart, and being violent towards a friend like Bulma goes against his character traits. Fanfiction should also, in general, stay true to the essence of the characters, and such a scenario of Goku being violent with Bulma is not in line with the positive image of their relationship in the original work.
It could be possible in fanfiction. Maybe Goku discovers a new type of wish - granting magic that is even more powerful than the Dragon Balls. Or perhaps he travels to a different dimension where time and death work differently. Fanfiction allows for creative interpretations. But in the official Dragon Ball story, there's no indication that such a thing could occur. The Saiyan race has its own limitations and the concept of death is pretty well - established in the series.
Hit is often a popular character in such fanfictions. His time - stopping ability makes him a very interesting character to write about. Writers can explore different ways he uses his power in the context of Universe 9, like using it to outwit opponents from that universe.