A cool plot could involve the Watchmen's Silk Spectre and DC's Wonder Woman teaming up. They could compare their different experiences as female heroes in their respective universes. They might also face a common enemy that requires both their unique skills and perspectives to defeat, like a powerful misogynistic villain who wants to take over both universes.
One interesting plot idea could be that a character from DC, like Batman, somehow ends up in the Watchmen universe and has to deal with the moral ambiguity there. He might find himself clashing with Rorschach over their different views on justice.
Perhaps a crossover where Dr. Manhattan from Watchmen enters the DC universe during a major crisis. His god - like powers could either be a huge help or a major disruption. For example, he could change the outcome of a battle between the Justice League and their enemies in a way that no one expected, leading to new power dynamics and moral dilemmas for the DC heroes.
Another plot could involve Gohan being mistaken for a new metahuman in the DC universe. As he tries to find his way back home, he gets caught up in a conflict between the Justice League and a group of supervillains. His Saiyan powers could be the key to resolving the situation.
One idea could be Goku ending up in the DC universe and having a friendly spar with Superman. Their different power sources and fighting styles would make for an exciting encounter. Maybe Goku learns about Kryptonite and how it affects Superman, which gives him a new perspective on weaknesses.
One idea could be Wolverine getting transported to the DC universe and teaming up with Batman. They could combine their detective skills to solve a mystery that involves both mutants and metahumans. For example, a new villain is creating chaos in Gotham by using some sort of technology that affects Wolverine's healing factor in strange ways.
One idea could be the Boys teaming up with a DC hero like Superman, but then realizing his 'good guy' image might be a facade too. Another could be Homelander facing off against Batman in a battle of wits and power.
One idea could be that Naruto and his friends are transported to the DC Universe. Naruto's chakra could be seen as a form of magic in the DC world. He might team up with Superman to stop a powerful villain who is after both kryptonite and Naruto's chakra. Another plot could involve Batman being intrigued by Naruto's ninja skills and trying to incorporate some of them into his own combat style.
A cool plot for dc super heroes crossover fanfiction could involve Wonder Woman and Aquaman. Maybe there's a threat that endangers both Themyscira and Atlantis. They must combine their unique skills, like Wonder Woman's combat abilities and Aquaman's control over the sea, to save their respective homes. Also, a Martian Manhunter and Cyborg crossover could be interesting. The Martian Manhunter's shape - shifting and telepathy, along with Cyborg's technological prowess, could be used to stop a cyber - psychic threat.
Maybe a crossover with the Justice League. The DC Superhero Girls look up to the League, and in this fanfiction, they could be called upon to help when the League is incapacitated by a powerful magic spell. It would be a chance for the girls to prove themselves on a bigger stage.
One idea could be that Naruto, with his Mokuton abilities, gets transported to the DC universe. He might team up with Green Arrow in Star City. Since Naruto can create and control plants, he could help Green Arrow by using the Mokuton to create natural barriers during battles or to track enemies by sensing their movements through the plants. Another plot could involve Naruto meeting Poison Ivy. They could have an interesting dynamic as both have a connection to plants. Naruto might try to convince her to use her powers for good instead of causing chaos.
One interesting plot idea could be a crossover where a character from another fandom accidentally stumbles into Gringotts in the Harry Potter world. Maybe a time - traveling character who has to figure out how to navigate the wizarding bank's security and magical vaults without getting caught. Another could be a scenario where the goblins of Gringotts have a secret alliance with a group from another universe and Harry Potter and his friends have to uncover this plot that could potentially disrupt the wizarding economy. A third idea might be that a character from a different story has a special key or artifact that unlocks a long - forgotten and extremely powerful vault in Gringotts, leading to a race between the good and bad forces in the Harry Potter world to obtain what's inside.
A cool dc superheroes crossover fanfiction could involve Wonder Woman and Aquaman. They could discover an ancient underwater civilization that has a connection to the Amazons. As they explore this link, they face off against some sea - based villains and also have to deal with the political tensions between the surface world and Atlantis.