Perhaps in fanfic, Batman avoids Wonder Woman because of the political implications. Wonder Woman is often involved in diplomatic matters between the Amazons and the outside world. Batman wants to stay away from politics as much as possible in his fight against crime in Gotham. Her political involvements could draw him into a world he doesn't want to be a part of in the fan - made stories.
Batman might avoid Wonder Woman in fanfic because he's afraid of getting too close to someone with such strong emotions. He's used to suppressing his own feelings, and Wonder Woman is very passionate. Her presence could stir up emotions in him that he doesn't want to deal with in the fictional stories.
One possible reason could be their different approaches to justice. Batman is more about vengeance and using his own set of rules in Gotham, while Wonder Woman comes from a place of more idealistic and Amazonian values of justice. Their clash in ideologies might lead to an argument.
One reason could be a misunderstanding. Maybe Batman suspects Wonder Woman of being involved in something she's not, like a potential threat to Gotham that he misinterprets. Another could be ideological differences. Batman is very much about justice in his own city, while Wonder Woman has a more global and myth - inspired view of justice.
One possible scenario could be that they are in the middle of a life - or - death battle against a common enemy. In the heat of the moment, as they realize how much they rely on each other, they share a kiss. It could be a moment of pure instinct and connection.
His connection with Gotham City. Batman has a deep and personal connection with Gotham, and the city almost seems to be an extension of him. In fanfiction, Wonder Woman, who is more associated with Themyscira, might envy this strong bond. She may feel that his relationship with Gotham gives him a unique identity that she lacks in relation to any particular place.
In Batman and Wonder Woman fanfic, 'branches' could refer to different storylines or plot directions. For example, a fanfic might start with a common premise, like Batman and Wonder Woman teaming up to fight a new villain in Gotham. Then, one branch could be that they discover the villain has ties to an ancient Amazonian curse, leading them on a journey to Themyscira. Another branch might involve the villain being part of a secret society in Gotham, which Batman has to infiltrate with Wonder Woman's help.
One possible plotline could be that Batman sacrifices himself to save Wonder Woman from a powerful enemy. Maybe he takes on a self - destructing device or holds off a horde of villains while she escapes. Another could be that he is poisoned by a new and deadly toxin, and in his final moments, he imparts some crucial knowledge or advice to Wonder Woman.
She may not like the false interpretations of Batman in some fanfictions. Fanwriters might change his personality or motives, and as a fellow hero, she doesn't appreciate that.
It could also be due to mind control. A powerful villain might have controlled Wonder Woman's mind and made her turn against Batman. In this scenario, Wonder Woman would act against her own will and kill Batman, creating a tragic situation in the fanfiction.
A possible storyline could be that Wonder Woman comes to Gotham to investigate some strange occurrences that seem related to her world. She teams up with Batman, and they discover a cult that is trying to summon an ancient evil. Along the way, they learn to respect each other's methods.
Yes, there are likely fanfics out there with Batman and Wonder Woman getting married. The DC Comics fan community is quite creative, and many fans like to explore different relationship dynamics between their favorite characters through fanfiction.