Well, one possible plot could be that Naruto and Goku somehow end up in each other's universes. Naruto could be intrigued by the concept of ki and try to learn it, while Goku might be interested in Naruto's ninja skills like shadow clones. They could team up to fight a common enemy, perhaps a new villain created by fusing some of the bad guys from both universes, like a combination of Orochimaru and Frieza.
In a crossover, it really depends on how the powers are combined. If Naruto could somehow combine the Nine - Tails' chakra with Sage Mode and then learn some ki techniques from the Dragonball Z side, he could be extremely powerful. But Goku has been training for a long time and has access to godly ki. So he would be a top contender as well. Vegeta too, with his own determination and power - ups, could also be in the running for the strongest.
Well, it could be really exciting. Picture Naruto with Goku's ability to go Super Saiyan. Maybe Naruto could learn the Kaio - ken technique. The story could involve the two universes colliding, with villains from both sides teaming up. So Naruto and his friends from Konoha would have to join forces with Goku and the Z - fighters to save both their worlds.
It's hard to say. Goku in his Super Saiyan forms has incredible power and can destroy planets. But Naruto has the Nine - Tails' power and Sage Mode. If we consider Naruto at his peak with all the tailed beasts' power combined, he could give Goku a tough fight. However, Goku's ability to constantly increase his power level might give him an edge in the long run.
Well, perhaps the Dragon Balls are accidentally sent to the Naruto universe. Naruto and his friends then have to figure out what these strange orbs are. Meanwhile, Goku and his pals come looking for the Dragon Balls and end up meeting Naruto. They could exchange their different fighting styles and techniques, like Naruto teaching Goku about chakra control and Goku showing Naruto how to sense ki.
One of the best crossovers could be the combination of power - ups. For example, Naruto's Sage Mode combined with Goku's Super Saiyan form. It would be interesting to see how their powers interact and if they could learn from each other's fighting styles.
Bulma from Dragon Ball Z in Naruto fanfiction has potential. She is smart and resourceful. In the Naruto world, she could use her intelligence to create new technologies or help with strategic planning during battles, and her interactions with the ninja characters would add a new dimension to the story.
Another interesting pair could be Sakura and Bulma. Sakura is a strong - willed ninja with medical skills, and Bulma is a brilliant scientist. They could collaborate on creating new technologies or medical treatments. Bulma could be fascinated by the chakra system in the Naruto world and try to find ways to use it in her inventions, while Sakura could learn a lot about advanced technology from Bulma.
One interesting plot could be that the Pokemons are suddenly exposed to the energy of the Dragon Balls. Some Pokemons start to gain Saiyan - like abilities. For example, Pikachu could become Super Saiyan Pikachu, with its electric powers amplified to an extreme level. It could then face off against powerful Pokemon villains in a whole new way, with the fast - paced combat style of Dragonball Z.
Well, one way the storyline could blend is by having Ruby's unique abilities from her own world interact with the power levels in Dragonball Z. For example, if Ruby has some sort of magic, it could be an interesting contrast to the ki - based powers in Dragonball Z. Maybe she could team up with Goku and his friends to fight a common enemy. Her different fighting style would also add a new dimension to the battles.