In a good DC crossover fanfiction, the conflict has to be engaging. It could be an internal conflict within a character, like if Green Arrow has to choose between his loyalty to his city and helping the Justice League in a larger battle. Externally, the villain should be a worthy adversary. It can't be too easy for the heroes to defeat. And the fanfiction should also respect the lore of the DC universe. If it goes against established facts too much, it just doesn't feel right to the fans who know the DC world well.
A good DC crossover fanfiction should blend the different universes seamlessly. Let's say it's a crossover between the Arrowverse and the main DC Comics universe. The two settings should mesh well, with the characters from each feeling like they belong in the new combined story. Also, it should add something new to the characters. Maybe give us a new side to Aquaman that we haven't seen before in the official comics. Another important aspect is pacing. It can't be too slow or the readers will lose interest, but it also can't be so fast that we don't get to enjoy the story.
Well, first, a good DC crossover fanfiction has to have interesting character interactions. For example, seeing how Batman would react to meeting Wonder Woman for the first time in a new context. Second, a unique plot. Instead of the typical 'save the world' plot, it could be something like the heroes having to solve a mystery that involves different dimensions. Third, accurate portrayals of the characters. If Superman is in it, he should still be the big - hearted, powerful hero we know.
The plot needs to be engaging. It could be a threat that forces the two universes to collide, like an all - powerful villain who can only be defeated by the combined forces of DC and Marvel heroes. This gives a reason for the crossover and keeps the readers hooked. For example, if there's a villain who can manipulate time across both universes, that would create a lot of interesting storylines.
There's also a fanfiction where Thor and Superman are pitted against each other in a friendly competition that turns into a real battle when a powerful villain manipulates the situation. It shows how their powers compare and contrast. Thor's godly powers and Superman's alien abilities make for an interesting dynamic.
A good crossover in fanfiction often has well-matched characters and worlds that blend seamlessly. The storylines should complement each other without feeling forced.
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.
Well, there's a fanfic called 'Supernatural in Gotham'. In this one, the boys from Supernatural find themselves in Gotham City. They team up with Batman to fight against some supernatural threats that are plaguing the city. It's a really cool read as it shows how the different skillsets of the Supernatural characters and the DC heroes work together.
Originality is a big factor. A Pokemon crossover that takes a fresh approach, like a Pokemon and Alice in Wonderland crossover where the Pokemon are the strange creatures in Wonderland and Alice is a Pokemon trainer. It gives a new perspective on both universes and makes the fanfiction stand out. Also, if it can capture the essence of both franchises, it will be well - received by fans of both.
Good character integration is key. For example, if Naruto is crossed over with a character from another universe, their personalities should be well - balanced and interact in an interesting way. If it's Naruto and Goku from Dragon Ball, their different power levels and attitudes towards fighting should be explored.
Character development is key too. When RWBY characters meet characters from another universe, like in a RWBY and DC Comics crossover, they should grow and change in response to the new situations and characters they encounter. This could be Weiss learning new ways of combat from Batman or something like that. Also, a good plot that doesn't simply rely on the novelty of the crossover but actually tells a great story is very important. It should have conflict, resolution, and keep the reader interested throughout.
A good 'Bleach' crossover fanfiction often has well - integrated universes. For example, if it's a 'Bleach' and 'Dragon Ball' crossover, the power levels and the different types of energy in both worlds should be combined in a believable way. If the fanfic just throws the characters together without any thought to how their worlds' rules work, it won't be as good.
A good 'Good Doom Crossover Fanfiction' has well - integrated universes. For example, if it's a crossover with 'Metroid', the different technologies and atmospheres of both Doom and Metroid need to blend smoothly. The Doom Slayer's movements in the more enclosed and alien - like environments of Metroid should feel natural.