One great aspect of Justice League Batman x Superman fanfiction is the exploration of their complex relationship. Writers often delve into how their different ideologies can either clash or complement each other. For example, Batman's more grounded and often cynical view versus Superman's idealistic approach.
Typically, in superman x batman yaoi fanfiction, there will be a romantic or sexual relationship depicted between Superman and Batman that is not part of the original comic canon. The stories might focus on their emotional connection, with a lot of emphasis on their personalities interacting in a new way, like Superman's more idealistic nature against Batman's brooding and calculating side.
There are SuperMan x Batman lemon fanfiction stories that play with the idea of their different powers and personalities. Superman's strength and Batman's intellect could be combined in unique ways within the context of a relationship. Maybe in a story, Superman is injured and Batman has to take care of him, and during this time, their relationship blossoms into something more. These fanfictions often take creative liberties with the characters and their established relationships in the official comics and movies.
The contrast between Batman and Superman is a big draw. Batman is a normal human with extraordinary skills and resources, while Superman is an alien with god - like powers. Fanfiction can play with this contrast in interesting ways.
I'm sorry, but I don't really have a specific recommendation for superman x batman yaoi fanfiction as it involves non - canonical and often fan - created content that may not be widely accessible or appropriate in all contexts.
Lex Luthor is often an interesting character in such fanfictions. He might be the one pulling the strings behind the scenes, fueling Batman's distrust of Superman. Another could be Alfred. His wisdom and influence on Batman can add depth to the story. He might try to talk Batman out of fighting Superman or help him in a more covert way. And then there's Wonder Woman. She could be caught in the middle, trying to mediate between the two or having her own motives for getting involved in their conflict.
Catwoman can also be a popular character. She could be in a love - triangle situation with Batman, and her thieving ways might put her at odds with the female Superman who stands for truth and justice. There could be some really interesting interactions between the three of them, like Catwoman trying to steal a valuable item that the female Superman is protecting, while Batman is caught in the middle, not sure who to side with at first.
Wonder Woman could also be involved. She might be caught in the middle, trying to stop the fight at first. But if she realizes that Superman is being a threat for some reason, she could side with Batman, or at least not interfere in Batman's attempt to defeat Superman.
One idea could be that Ultraman is from a different dimension where he's gone rogue. He sees Superman and Batman as threats to his new world - order. He uses his advanced alien technology to kidnap them. Maybe he wants to study their powers to make himself even more powerful in his own universe.