In the fanfic, there could be a plot twist where the Dragon Balls are corrupted. Instead of granting wishes as they normally do, they start causing chaos. This could lead to a race between the heroes and villains to either fix the Dragon Balls or use their new, chaotic power for their own ends. The Z - fighters would have to find a way to deal with this new threat while also fending off their usual enemies.
One idea could be a new villain from an unknown dimension arriving in the Dragon Ball universe. This villain has a unique power that nullifies ki attacks, forcing the Z fighters to rely on their martial arts skills alone.
One idea could be exploring a dimension where the Saiyans never lost their planet and became a peaceful, advanced civilization. Another could be a dimension where the Z - fighters have to face off against versions of themselves that are corrupted by dark magic. Or perhaps a dimension where the Dragon Balls have different wishes and limitations.
One idea could be a gamer getting transported into the Dragon Ball Z universe and having to learn the ki techniques like a newbie Saiyan. They could start from the very bottom, training with Goku or Vegeta, and slowly rise in power. Another could be a gamer who has the ability to hack the Dragon Ball Z game world in a way that changes the rules, like making the Dragon Balls more accessible but with a new set of challenges to face when using them.
One interesting crossover could be a battle between Hulk's brute strength and Goku's Super Saiyan power. Maybe in the fanfic, they start off as rivals, with Hulk misunderstanding Goku as a threat to Earth. Their fight would be epic, with Hulk's limitless rage against Goku's increasing power levels. It could also explore how their different universes' power systems interact.
Goku is likely still one of the most popular characters. His determination and constant pursuit of strength make him a fan favorite even in fan - made stories. His ability to adapt and find new ways to become stronger always keeps the story interesting.
One possible plot could be that Thanos somehow gets his hands on the Dragon Balls. He wishes for the power to snap away half of all life in the universe even more easily. The Z - fighters sense this great imbalance and travel to the Marvel universe to stop him. Goku, being the most powerful Z - fighter, tries to fight Thanos but quickly realizes his strength is different from what he's used to. Vegeta might have to team up with Iron Man to come up with a technological way to counter Thanos' Infinity Stones while Goku trains to reach a new level of Super Saiyan to take on Thanos directly.
One possible change is his power level. Fanfictions often give Goku new power - ups that are even more extreme than in the official story. For example, he could gain a 'Ultra - Ultra Saiyan' form that is many times stronger than the regular Super Saiyan forms. His appearance in this form could be very different, with longer hair, more defined muscles, and a new color to his aura. Another change could be in his family life. Maybe he spends more time with his family, teaching his sons and daughter new fighting techniques that he created himself. This would show a more domestic side of Goku that we don't see as much in the original series.
Well, the concept of the announcer as a character in the fanfic can bring a lot to the table. They could be a source of humor, like making funny remarks about the characters' hairstyles or the strange names of their attacks. Also, they might have a backstory that ties them into the Dragon Ball Z universe in an unexpected way, perhaps having some connection to the Kais or other powerful beings.
One interesting 'Dragon Ball Z Human Fanfic' story could be about a human character who discovers they have latent Saiyan powers through some strange genetic quirk. They then have to learn to control these powers while dealing with the normal human world around them.
One idea could be Shaggy getting transported to the Dragon Ball Z universe and accidentally eating a Senzu bean, which gives him superhuman strength and he has to figure out how to control it. Another could be Shaggy befriending Goku and teaching him some of his laid - back ways while Goku teaches Shaggy how to fight.