One common theme is their relationship. It could be a romantic relationship where they overcome their differences. Another theme is them teaming up to fight a common enemy. For example, they might join forces against a new super - villain in Gotham.
The exploration of their respective backstories is also a theme. Writers often delve into how their pasts shape their interactions. Nyssa's connection to the League of Assassins and Batman's dark past in Gotham can create interesting storylines when combined. Sometimes, there's also a theme of redemption, where one or both of them try to atone for their past actions through their relationship or actions together.
Romance is also a prevalent theme. Many fanfictions explore the possibility of a romantic relationship between Ash and Nyssa. This could involve them slowly realizing their feelings for each other over the course of the story. For instance, they start off as friends but then small moments of attraction start to surface. It could be a very sweet and slow - burn type of romance.
One common theme is redemption. Nyssa has a complex past, and often in fanfiction, she is on a path of redemption, with Oliver being a part of that journey. For example, in many stories, Oliver helps her come to terms with her actions in the League of Assassins.
One common theme is loyalty. Their loyalty to each other, whether it's in the face of danger or in dealing with personal issues. Another theme is friendship evolving into love, as they start off as comrades and slowly develop deeper feelings.
One common theme is the merging of their different backgrounds. Oliver has his own set of values from his upbringing in Star City, while Nyssa comes from the League of Assassins. Their marriage often involves them finding a common ground between these two very different worlds.
Love and sacrifice is also a big theme. Their relationship is complex, and often in fanfictions, they have to make sacrifices for each other or for the greater good. This can range from giving up their own desires to risking their lives. It adds a lot of depth to their relationship.
One common theme is friendship. Since they come from different backgrounds, their journey to becoming friends is often explored. Another theme is redemption. Maybe Laurel helps Nyssa move away from some of her darker past actions or vice versa.
One common theme is adventure. They might go on some exciting quests together, fighting bad guys in Gotham or in Bekka's world.
One common theme is Batman being overly protective of his sidekicks like Robin. He might go to extreme lengths to keep them out of danger, even if it means restricting their actions. For example, he could forbid Robin from going on certain missions that he deems too risky.
One common theme is the push - and - pull relationship between them. They are often on opposite sides of the law, but there's an undeniable attraction. Another theme is redemption. Catwoman may be trying to turn her life around because of Batman's influence. Also, the theme of secrecy and trust comes up a lot. They both have secrets, and the fanfictions often explore how they deal with trusting each other.
One common theme could be Batman's struggle with inner anger. For example, he might be angry at the criminals who keep escaping justice. Another theme could be his anger towards the corruption in Gotham that he's constantly fighting against. And sometimes, his anger might be directed at his own limitations, like when he fails to save someone.