Here's a plot. Gohan stumbles upon an egg. When it hatches, out comes a strange, never - before - seen animal. This animal has the ability to foresee future threats. Gohan teams up with it to prevent a series of disasters that are about to befall Earth. Along the way, they face challenges like other animals that are under the control of an evil wizard who wants to stop them from averting the disasters.
One idea could be that Gohan discovers an ancient animal with special powers. Maybe it's a mystical deer that can enhance his ki when he's near it. Another plot could involve Gohan turning into an animal himself, like a powerful eagle, and having to learn to control his new form and its abilities. Or perhaps he befriends a group of talking animals who help him in a battle against a new enemy.
Well, a plot could center around Gohan finding a wounded animal. As he heals it, he realizes it has a connection to an otherworldly realm. This leads him on an adventure where he has to protect the animal from an evil force that wants to use its power for bad. Also, he could enter a parallel world where all the Dragon Ball characters are animals, and he has to find a way to return to his normal world while dealing with the animal - versions of his friends and foes.
One idea could be Goku and Gohan going on a special training journey to a new planet with unique gravity and energy sources. This would force them to adapt and develop new techniques together.
One idea could be Gohan and Lime teaming up to face a new and powerful enemy that neither of them could defeat alone. They could train together, with Gohan teaching Lime some of his Saiyan techniques.
Another plot could involve Gohan and Videl having to deal with a strange power that is affecting the people around them. They might have to figure out the source of this power and find a way to stop it while also strengthening their relationship. This could include some emotional moments between them as they support each other through tough times.
One idea could be Future Gohan training a new generation of fighters in a post - apocalyptic world. He could pass on his skills and knowledge, creating a new hope for the future. Another plot could involve him finding a way to travel back in time to prevent the events that led to his world's destruction. Maybe he discovers a hidden power within himself that he didn't know he had and uses it to fight against the remaining threats in his world.
Perhaps a story where Gohan and Videl have to team up to protect their family from a new and powerful threat that is specifically targeting them. They would have to use their combined skills and the power of their relationship to overcome it. In this fanfiction, we could see how their love for each other and their family gives them the strength to fight.
One idea could be Gohan crossing over into the Naruto universe. He could team up with Naruto and use his Saiyan powers to fight against the Akatsuki. Another plot could be Gohan in the Harry Potter world, using his ki to defend Hogwarts from Voldemort. Or perhaps Gohan in the DC universe, fighting alongside Superman against a common enemy.
One idea could be Gohan traveling back to the Saiyan - Planet Vegeta era. He could try to prevent the destruction of the Saiyans by Frieza. Maybe he'd use his knowledge of future events and his advanced power to stand up to Frieza earlier. Another plot could be him going back to a time during the Cell Games. He could train his past self more effectively, leading to an even stronger version of himself to face Cell.
A plot could revolve around Chichi wanting Gohan to focus more on his studies and less on training. This causes some tension between them as Gohan feels he needs to train to protect his family. It could show how they resolve this difference in priorities.
She could be kidnapped by an enemy who wants to use her as leverage against Gohan and the other Z - fighters. This would lead to a rescue mission where the Z - fighters have to face new and powerful foes. For instance, the kidnappers might be from a far - off planet that has a grudge against the Saiyans.
One idea could be a character developing an animal - like instinto during a battle and using it in a unique way. For example, Goku could gain the instinto of a tiger, making his attacks more fierce and unpredictable.