One idea could be a school project that forces Anya and Damian to work together outside of school hours. They start off bickering as usual but gradually learn more about each other's dreams and fears. Another could be a story where Anya accidentally uses her telepathy to overhear Damian's secret admiration for her in a moment of vulnerability, which then leads to a series of awkward yet heartwarming interactions. Or perhaps a plot where they both get lost in a strange part of the city during an event at school and have to rely on each other to find their way back.
One idea could be that Anya and Damian grow up and both enter the world of international diplomacy. Anya, with her telepathic abilities still somewhat intact, has an edge in understanding the true intentions of other diplomats. Damian, having grown into a confident and intelligent young man, works alongside Anya to solve international crises. They start off as rivals in this new world but gradually realize their feelings for each other as they face challenges together.
One common theme is friendship development. Since they start off not really getting along well, many fanfics focus on how they gradually become friends or even something more. For example, they might start to understand each other's quirks and grow closer as a result.
There's 'Damian and Anya: A New Adventure'. In this fanfic, they end up on a school project that takes them outside of their comfort zones. It's really interesting to see how their personalities clash and then gradually complement each other throughout the story. It also has some really cute moments between them that fans of the pairing will love.
In a fanfic, their relationship could develop gradually. First, they might start with small exchanges of kindness, like Damian sharing his lunch with Anya when she forgets hers. Then, as time passes, they could be involved in a school play together. During the rehearsals, they get to know each other on a deeper level. Anya's telepathy might also play a role, for instance, she could use it to help Damian when he's in a tough situation at school, which would make him trust her more. This trust would be the foundation for their relationship to grow further into a real friendship or something more.
Perhaps a story where Damian gets kidnapped by an old enemy of Batman. Batman then has to race against time to save him, all the while reflecting on their complex father - son relationship. This could involve flashbacks to how Damian came into Batman's life and how they've grown together.
One idea could be that the reincarnated character uses their modern knowledge to improve Damian's combat skills in a new and unexpected way. For example, introducing new training methods from different martial arts styles around the world.
One plot could be them teaming up to fight a new villain in New York. They both have unique powers and skills, so seeing them combine forces would be exciting.
Perhaps they find a lost technology that could change the future of their world. Sam wants to use it for the good of all, but Anya is more cautious. This difference in opinion causes some friction between them at first. But as they face external threats who also want the technology, they learn to work together and reconcile their differences.
The OC could be a scientist who is working on a top - secret project that has implications for Gotham's safety. Damian gets involved when he realizes there are bad guys after the OC and the project. As they work together to protect the project and each other, a romantic relationship blossoms. Their relationship is also tested by Damian's strict code of justice and the OC's scientific ethics.
Another plot could involve Damian being sent on a mission by Batman to infiltrate Young Justice, thinking there might be a mole or some sort of internal problem. But as he spends time with the team, he starts to actually care about them and has to decide whether to complete his original mission or protect his new friends.