Overall, crossovers between Marvel and DC Comics aren't that common. Both companies have their own distinct universes and storylines, and when they do crossover, it's a big deal and attracts a lot of attention from fans. But it doesn't happen frequently.
Deadpool has made a few crossovers to DC Comics. These crossovers tend to be special one-offs that combine the humor and action of Deadpool with the established DC characters and settings. They can be quite exciting for fans of both franchises.
DC and Marvel have had some crossover events in comics. They usually happen as special limited series or one-shot issues to generate buzz and appeal to fans of both franchises.
Not likely anytime soon. These two comic universes have their own storylines and characters, and a crossover would involve a lot of complex negotiations and planning.
One popular idea is the crossover between Batman and Superman. Fans often write about their team - up against a common, extremely powerful villain like Darkseid. It allows for exploring their different approaches to heroism and how they interact.
First, you need to know the characters well. Read a lot of DC comics to understand the personalities, powers, and backstories of the characters you want to cross over. For example, if you're crossing over Wonder Woman and Aquaman, know their different worlds and what they stand for.
Another idea is that Greninja gets exposed to some kind of meta - human - creating substance in the DC universe and gains new powers. It could then join the Teen Titans, sharing its unique Pokémon abilities with the group. It would be interesting to see how Greninja interacts with characters like Robin, Starfire, and Cyborg, and how it uses its powers in battles against the Titans' enemies.
Occasionally, there are. These crossovers often generate a lot of buzz among comic fans. They offer unique storylines and interactions that you don't typically see in their individual universes.
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.
One idea could be that Harry Potter and his friends are transported to the DC Comics universe. They could team up with the Justice League to fight a common enemy like Voldemort who has somehow gained powers from a DC Comics villain. For example, Voldemort could have made a deal with Darkseid to gain more power in exchange for helping him conquer the wizarding world first. Then, Harry and the likes of Superman, Batman, and Wonder Woman would have to combine their magical and super powers to stop them.