A common theme is the exploration of different power systems. Like how the martial arts in Ranma 1/2 compare to the ki - based powers in Dragon Ball Z.
Well, it could be about Naruto characters learning ki techniques from Dragon Ball Z. For example, Naruto might try to learn how to use the Kamehameha wave. It would be really interesting to see how his chakra system would interact with ki energy.
The most exciting part is seeing the different power sets interact. Like Thor's lightning powers against Vegeta's energy blasts. It would be a show of raw power and strategy.
It would be amazing. Picture Goku teaming up with Iron Man. Goku's raw power combined with Iron Man's high - tech gadgets could make for some epic battles against villains like Thanos or Frieza. They could learn from each other's fighting styles too. Goku might be intrigued by Stark's intelligence and technology, while Iron Man could be in awe of Goku's ability to constantly increase his power level.
One possible plot could be that Naruto and his friends are facing a powerful new enemy in their world. However, this enemy has some sort of connection to the Dragon Balls. Goku and Vegeta sense the strange energy from Naruto's world and travel there using Instant Transmission. They then team up with Naruto and the others. Naruto is amazed by Goku's strength and ki abilities, while Goku is intrigued by Naruto's chakra and ninja skills. Together, they combine their powers to defeat the common foe.
I really like 'The Fusion of Two Worlds'. In this fanfiction, the technology in Young Justice's world and the ki powers from Dragon Ball Z are combined in a unique way. It starts with a strange portal opening up and the characters slowly getting to know each other's abilities. There are some great character interactions, like when Robin and Gohan start comparing their detective and martial arts skills.
One interesting storyline could be Goku teaming up with Iron Man. Goku's raw power and martial arts skills combined with Iron Man's high - tech gadgets would make for an epic battle against a common enemy like Thanos. They could learn from each other's fighting styles and strategies. Another could be Vegeta and Captain America. Vegeta's pride and determination would clash and also blend well with Captain America's leadership and unwavering sense of justice. A third storyline could involve the Z - Fighters helping the X - Men deal with a mutant - hating villain. The Z - Fighters' unique powers would add a new dimension to the X - Men's battles.
Another concept could be that Sonic and his friends end up in the Dragon Ball Z world due to some sort of interdimensional rift. They have to adapt to the new world with its different power levels and fighting styles. Sonic could teach some of the Z - fighters his unique spin - dash and homing attack moves, while Goku could show Sonic how to harness and control ki energy.
The most exciting part is seeing the different power sets interact. Sonic's speed and agility against Goku's super strength and ki blasts make for some really cool battle scenes.
One idea could be that Goku and his friends are on a quest to find the rarest Pokemon in the Dragon Ball Z world. Maybe the Dragon Balls have the power to summon legendary Pokemon. For example, the Saiyans could use their fighting skills to train Pokemon for battle. Another idea is that the villains from Dragon Ball Z, like Frieza, try to capture powerful Pokemon to use in their evil plans.