Their relationship could develop through mutual respect. Batman respects Supergirl's power, and Supergirl respects Batman's intelligence and strategic skills. They start by working on small missions together and gradually build trust.
In an Injustice 2 fanfiction, their relationship might develop as Supergirl, being new to this dark world, turns to Batman for guidance. Batman, initially cautious, starts to open up to her as he sees her pure intentions. They could have deep conversations about justice and morality, which bring them closer. For example, they might debate about the use of force and how to deal with the corrupted heroes. Through these exchanges, they form a bond that is both a mentorship and a friendship.
One idea could be that Batman tries to train Supergirl to better control her powers in the context of the Injustice 2 universe. He might see her as a potential force for good against the tyrannical regime. Another could be that Supergirl discovers a way to bring back the more heroic Superman she once knew, and Batman has to decide whether to trust her plan or not.
In fanfiction, their relationship can be developed by introducing a third - party threat that specifically targets their relationship. For example, a villain who tries to turn them against each other by spreading false rumors or creating misunderstandings. As they work through these issues, they come to understand each other better. Additionally, they could participate in joint training sessions. During these sessions, they can teach each other new techniques and improve their powers, all while building a stronger relationship.
Supergirl's exuberance and her willingness to trust can sometimes clash with Batman's more cynical view. However, in the context of a romance in fanfiction, this can be a source of growth for both of them. Batman might start to trust more because of Supergirl, and Supergirl might become more cautious under Batman's influence. Their personalities also play a role in how they show affection. Batman might be more reserved in his displays, while Supergirl could be more open and affectionate, which could lead to some sweet and sometimes awkward moments as they navigate their relationship.
In an Injustice fanfiction, their relationship might develop through conflict at first. They have different views on how to handle the chaos in the world. However, as they face greater threats together, they begin to understand each other better. For example, when they are up against a powerful new villain that neither could defeat alone. This shared experience could lead to a stronger bond between them, evolving from grudging allies to close friends or even something more romantic depending on how the story unfolds.
It could be shown as a very strained relationship. For example, Wonder Woman might initially be very hostile towards Batman, seeing him as a threat to the order Superman has created. But as time goes on, she starts to see the value in his approach. There could be many tense confrontations between them that gradually turn into more respectful exchanges as they understand each other better.
The comic portrays Batman as a fierce opponent of injustice. He's relentless in his pursuit of justice, but also has to deal with the consequences of his actions and the pushback from those in power.
They often team up to fight common villains. Sometimes they have a friendly partnership, but there can also be moments of tension due to their different approaches.
A way to develop their relationship in this type of fanfiction is through joint parenting. They might have different approaches to raising their kids. Batman could be very strict about discipline and training, while Catwoman might be more lenient and focus on teaching the kids about the importance of freedom. Through these differences, they learn to understand each other better and grow closer as a couple. Also, they could face external threats to their family which forces them to rely on each other more, strengthening their bond.
In the Injustice Supergirl comic, the story follows Supergirl as she tries to restore balance and justice in a universe gone awry. There are intense battles and emotional moments as she grapples with difficult choices.
The relationship can develop through shared experiences. For instance, they could go through the process of preparing for the baby together, like shopping for baby stuff. Batman, despite his dark and brooding nature, might show a softer side as he anticipates the arrival of the child.