Well, the plot could involve the Z - fighters teaming up with the Justice League to fight a common, extremely powerful enemy. Maybe Darkseid teams up with Frieza, and their combined forces are too much for either group alone. So, Goku and Superman start training together to learn from each other's strengths, like Goku learning about Superman's heat vision and Superman learning Goku's Instant Transmission.
One idea could be a crossover where Goku is accidentally transported to the Justice League's universe. He might initially be seen as a threat due to his power but then they realize he's a good - hearted fighter. They could team up to fight a common enemy like Darkseid who has somehow acquired the Dragon Balls and is using them for his evil plans.
Well, it could be really epic. Imagine Goku teaming up with Superman. They both have super strength and a strong sense of justice. Goku's martial arts skills combined with Superman's various powers like heat vision could make for some amazing fight scenes against powerful villains.
The power of the Saiyans' transformations could be a game - changer for the Justice League. For example, if Goku or Vegeta transform into Super Saiyan God or Ultra Instinct, it could give the League new ideas on how to access and utilize hidden levels of power. Meanwhile, the magic - based powers in the Justice League, such as Zatanna's magic, could be used to counter some of the more otherworldly threats in the Dragon Ball universe that are resistant to physical attacks.
A third possible storyline could be a story of misunderstanding at first. The two groups could initially see each other as threats. For instance, the Justice League might mistake the Z - fighters' high power levels as a sign of aggression. However, through a series of events and battles, they come to realize that they are on the same side and must work together to face greater threats. This could involve some epic one - on - one battles between characters like Vegeta and Superman before they finally team up.
One idea could be a crossover where Goku meets Superman. They could have a friendly sparring match to test each other's strength. Maybe they start off misunderstanding each other's motives but then realize they are both protectors of their respective universes.
Well, in such a fanfiction, the power levels would be a major aspect to consider. Dragon Ball characters often have extremely high power levels that can be measured in numbers, while Justice League characters have different kinds of powers like Batman's gadgets and intelligence. The story could involve a power - level adjustment or some kind of power - sharing device. For example, Vegeta might learn from Batman how to use strategy more effectively in battles, and in return, Batman could gain some ki - based abilities from Vegeta.
Some characters might not get along at first. Like Piccolo and Green Lantern. Piccolo is a stoic and often solitary character, while Green Lantern is part of a team. But over time, they could learn to respect each other's power and abilities.
Well, in such a fanfiction, the story might start with a strange energy signal that the Justice League detects. It turns out to be from a Dragon Ball. As they investigate, they meet Bulma. She explains to them about the Dragon Balls and their power. Then they team up to search for the remaining balls. Along the way, they face challenges not only from the Dragon Ball villains but also from some of the Justice League's enemies who see this new alliance as a threat to their plans. The two groups have to learn to work together, with their different cultures and power sets, to achieve their common goal of collecting all the Dragon Balls and making a wish that will save both universes.
Maybe there's a rift in the multiverse that merges parts of the Dragon Ball Z world and the DC Universe. The Z Fighters and the Justice League initially think they are enemies due to misunderstandings. For instance, when Goku first meets Batman, Batman might mistake Goku's carefree attitude for recklessness. But as they gradually figure out the situation, they team up to close the rift and fight off threats that are emerging from the merged worlds.