A fanfic could be written where a magical child appears in Gotham City. Batman is initially skeptical, but Wonder Woman believes in the child's good intentions. As they get to know the child, they realize that the child is a key to stopping an ancient evil that is about to be unleashed. They embark on a journey with the child to find the necessary artifacts and spells to defeat the evil.
Maybe there's a fanfic where a child is accidentally caught in the middle of a battle between Batman and some of his rogues gallery, and Wonder Woman steps in to save the child. The child then becomes sort of a mascot for the two heroes, inspiring them to work together more closely and also showing the softer side of the often - brooding Batman.
Maybe in a fanfiction, there's a parallel universe where Batman Beyond and Wonder Woman are part of a super - hero alliance against an alien invasion. Wonder Woman could lead the charge in direct combat, while Batman Beyond uses his detective skills to figure out the aliens' weaknesses. Their relationship could start off rocky as they have different ways of approaching problems, but they learn to work together effectively.
In a child - centered Batman and Wonder Woman fanfic, perhaps the two superheroes discover a child with the potential to be a great hero in the future. They decide to mentor the child. Batman teaches the child about stealth and strategy, and Wonder Woman imparts lessons on courage and justice. Together, they train the child to face the challenges that lie ahead.
One idea could be that Batman and Wonder Woman are investigating a series of strange disappearances in Crime Alley. They discover that an old enemy has returned and is using the alley's seedy underbelly to conduct experiments. Batman uses his detective skills while Wonder Woman uses her strength and wisdom to fight off the henchmen and ultimately face the main villain.
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.
A fanfic could explore what would happen if Catwoman found out Batman's true identity before he was ready to reveal it. Maybe she uses this knowledge to try and protect him from a threat that is specifically targeting Bruce Wayne, and in the process, their relationship takes an unexpected turn.
One idea could be a misunderstanding. Maybe some false information makes Batman think Wonder Woman has been compromised and he has to stop her. Another could be a competition for a powerful, mysterious artifact that they both believe they should safeguard. And a third idea could be a mind - control situation where Wonder Woman is being controlled by an enemy and Batman has to fight her to break the control.
A fanfic could explore a scenario where Batman is framed for a crime on Themyscira. Wonder Woman doesn't believe he's guilty and they have to work together to clear his name while also uncovering a conspiracy within her own homeland that threatens both their worlds.
Maybe in the fanfic, there is a threat to the entire world that only the combination of Wonder Woman's Amazonian knowledge and Batman's technological resources can solve. For example, an ancient artifact has been stolen and is being misused. They start off not trusting each other fully but as they work together, they develop a deep respect.
A great plot for this fanfic could be that a mysterious force is causing chaos in both Gotham and Themyscira. Batman and Wonder Woman join forces to investigate. Along the way, they discover that the source of the problem is related to an old grudge between two long - forgotten groups. As they dig deeper, they also explore their own feelings for each other and how their different approaches to justice can be reconciled.
Perhaps Batman discovers a strange artifact that has ties to Wonder Woman's homeland. He seeks her out for help in understanding it, and together they uncover a plot by an ancient evil force that was once sealed away but is now trying to return. Their journey involves not only fighting off minions of this evil but also learning about each other's worlds more deeply.