Another plot could be a crossover with the One Piece world. Broly could land on an island in the Grand Line and have to deal with pirates. He might end up teaming with the Straw Hat Pirates, and his raw power would be a huge asset against powerful foes like the Yonko. His lack of understanding of the pirate world would also lead to some comical and interesting situations.
A Broly crossover with the Naruto universe could be really cool. Picture Broly in the Hidden Leaf Village, his incredible power causing quite a stir. Maybe he could get involved in the fight against the Akatsuki, using his brute strength in a world of ninjas. It would be interesting to see how he adapts to chakra and ninja techniques.
One idea could be that Broly ends up in an alternate universe where he has to team up with Goku and the Z - fighters to fight a new, even more powerful enemy. This would force Broly to control his anger and work with his former foes.
One idea could be a crossover with the Dragon Ball Z heroes. Broly could team up with Goku and Vegeta to face a new, even more powerful enemy from another universe. This would bring out different fighting styles and power combinations.
One idea could be that Godlike Broly crosses over into the Dragon Ball Super universe and challenges Goku and Vegeta at their peak forms. His overwhelming power could force them to seek new power - ups and training methods.
One idea could be that Broly is transported to an alternate universe where he teams up with Goku from a different timeline to fight a new, powerful enemy. They have to combine their unique fighting styles to stand a chance.
Well, a plot could be centered around Broly's origin. In this fanfiction crossover, it could be revealed that Broly has a connection to an ancient race in a different part of the Dragon Ball universe. Goku and Vegeta discover this and together with Broly, they embark on a journey to uncover the secrets of this race. Along the way, they face various challenges and battles, and Broly has to control his power better to help his new allies.
One idea could be that Broly and Cheelai go on a journey across different planets to discover Broly's true origin. Another could be a story where Cheelai has to protect Broly from some powerful enemies who are after his power. And perhaps a plot where they get stranded on a desolate planet and have to work together to survive.
One idea could be that Bulma, while doing some research in a far - off planet, accidentally stumbles upon Broly. At first, Broly is hostile as he's used to being feared. But Bulma, being the smart and fearless woman she is, tries to communicate with him using her tech gadgets. She shows him things from Earth, like pictures of her family and friends. This makes Broly curious about Earth and he decides to follow Bulma back to Earth, leading to a series of adventures as he tries to adjust to this new world and protect Bulma from other threats.
One idea could be that Broly somehow ends up in the world of Black Lagoon. He might initially be seen as a huge threat by the Lagoon Company. But as the story progresses, they realize his power can be useful against their common enemies. For example, when facing powerful crime syndicates or military forces that are too much for them to handle alone.
One idea could be that in a post - apocalyptic future where Trunks is the last hope, Broly somehow appears. Maybe Broly has lost his memory and Trunks tries to train him to use his power for good. Another plot could be a time - travel accident that brings Broly to Trunks' time. They initially fight but then realize they need to team up against a common enemy like a new form of the Androids.
One idea could be that Broly and Trunks are forced to team up against a new, powerful enemy that threatens the entire universe. They start off not getting along because of Broly's wild nature and Trunks' more calculated approach. But as they face challenges together, they gradually learn to respect each other's strengths and form a deep bond.