A really cool concept for an SSJ2 Gohan crossover fanfiction would be to put him in the world of Middle - earth from The Lord of the Rings. Gohan's strength and honor would make him a great ally to the Fellowship. He could use his super speed and strength to fight off orcs and other dark creatures. He might also have some interesting interactions with Gandalf, learning from the wizard's wisdom while also sharing his own knowledge of martial arts and ki manipulation.
One idea could be a crossover with the Naruto universe. Gohan as SSJ2 could end up in the Hidden Leaf Village and interact with the ninjas. Maybe he helps in a battle against a powerful enemy using his Saiyan powers.
First, decide on the universe you want to cross Gohan with. Then, think about how Gohan would fit into that world. For example, if it's a modern - day Earth setting, consider how he would hide his powers or use them subtly. Next, come up with a basic plot like Gohan has to stop an evil force in this new world.
You could start by establishing the setting and the situation. Say you choose a crossover with the Avatar: The Last Airbender world. Begin with Gohan SSJ2 sensing an unusual energy in that world and deciding to investigate. This sets the stage for the story to unfold.
A Mystic Gohan crossover fanfiction could involve the world of One Piece. Gohan could land on the Grand Line and join a pirate crew. He'd have to adapt to the strange new world full of devil fruits and sea kings. His powers would be a great asset, but he'd also have to learn about the different cultures and ways of the pirates. Or, he could cross over into the world of Harry Potter. Gohan at Hogwarts would be a unique concept. He could use his powers to protect the school from dark wizards while also learning about magic.
One idea could be a crossover with the Dragon Ball Super universe. Future Gohan could meet the present - day Goku and Vegeta. They could train together and learn new techniques from each other. Another plot could involve a crossover with the Naruto universe. Gohan might use his ki powers in the ninja world, and perhaps have to face off against powerful ninja like Naruto or Sasuke. He could also learn some ninja skills in return.
A third idea is a crossover with the DC universe. Gohan could team up with Superman. Their combined strength would be off - the - charts. They could face off against powerful villains like Darkseid. Gohan's Saiyan fighting instincts combined with Superman's moral compass would make for an interesting dynamic, and they'd surely learn a lot from each other.
For a 'dbz gohan crossover fanfiction', a plot where Gohan crosses into the DC Comics universe would be exciting. He could team up with Superman and learn about different types of powers. Maybe he'd help Superman understand the concept of ki. Another idea is a crossover with the Final Fantasy series. Gohan could find himself in a world full of summons and magic, and use his martial arts to fight alongside the Final Fantasy characters.
A crossover with the Naruto universe is also a possibility. Godlike Gohan could end up in the Hidden Leaf Village. His power would be a mystery to the ninja there. He could help Naruto and the others fight against a new threat, perhaps an ancient evil that was sealed away long ago but has now been released. His energy attacks would be different from the ninja jutsu, and he could teach the ninja some new ways of fighting.
Perhaps Ultimate Gohan could cross over into the world of Star Wars. He could use his powers to assist the Jedi in their fight against the Sith. His ki blasts could be like a new form of Force power in that universe.
One idea could be that Gohan and Naruto are somehow transported to a new dimension where they have to team up to defeat a common enemy. Maybe a powerful villain who has the ability to absorb chakra and ki is threatening this new world. Another plot could involve Gohan teaching Naruto some of his martial arts techniques in exchange for Naruto showing Gohan how to better control his chakra flow for non - combat uses like levitation or super speed. A third idea is that they are pitted against each other in a tournament in a world where both Saiyans and ninja co - exist, but then they realize they are being manipulated by an evil force and decide to join forces.