Perhaps they argue over a decision regarding the Justice League. For example, Batman might want to take a more secretive and calculated approach to a threat, while Wonder Woman, being more open and believing in the power of unity, could oppose his idea. This difference in strategic thinking can easily spark an argument.
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.
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.
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.
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.
Well, the plot could involve Batman and Wonder Woman coming together because they see a unique strength in each other that no one else in the DC universe has. Their marriage might be a way to unite two very different ideologies. For example, Batman's more grounded, gritty approach and Wonder Woman's idealistic view. As they are married, they could go on missions together where their combined skills prove to be a great asset. But they also face internal struggles within the relationship. Batman might struggle with opening up completely to Wonder Woman due to his past traumas, while Wonder Woman tries to get him to trust more. And of course, there could be external threats from villains who see their union as a threat to their own plans in the DC world.
One possible plot could be that they are on a mission together, facing a great danger. In the heat of the moment, Batman realizes his true feelings for Wonder Woman and kisses her. This could then lead to them having to deal with their new - found relationship while still saving the day.
One possible plot could be that Batman and Wonder Woman have been fighting side by side for a long time. They gradually develop deep feelings for each other during their adventures. Eventually, Batman overcomes his brooding nature and proposes to Wonder Woman. They then plan a wedding that brings together all the superheroes and villains (in a truce for the day) in a grand celebration. Their union could also mean a stronger alliance in protecting the world.
Differing values can also lead to an argument. Suga might have a strong belief in one thing, like working hard all the time, while the reader believes in taking breaks. This clash of values can create a big argument in the fanfic. They would both be trying to convince the other of their point of view, which would lead to a heated exchange.
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.
Well, one possible plot could be that they start off as allies in the Justice League. They gradually realize their mutual respect turns into something more. Maybe they start secretly meeting up for coffee or walks in Gotham's less dangerous areas. They'd have to deal with their different worlds, Batman's dark and brooding nature vs Wonder Woman's more idealistic view. And of course, there'd be the reactions of their fellow superheroes to their relationship.