Often, there are themes related to her skills and how she uses them in different situations. For instance, her computer hacking skills or her combat training. There can also be themes of her facing challenges and overcoming them, whether it's dealing with a new villain in the Young Justice universe or personal issues within the team. Sometimes, her family background and how it influences her actions in the story are also common themes in these fanfictions.
You can try fanfiction.net. It has a large collection of Young Justice fanfictions, and there are likely many focused on Barbara Gordon. Another option is Archive of Our Own (AO3). It's known for its wide variety of fan-created works and has a great tagging system to help you find specific Barbara Gordon - related Young Justice fanfictions.
A more comical fanfiction could be set in a world where all the characters from Naruto and DC are in a high school together. Naruto has a huge crush on Barbara Gordon, and he tries all sorts of wacky ways to get her attention, much to the amusement and annoyance of their classmates.
One possible scenario could be that in this fanfiction, they meet in a unique situation. Maybe they are both working on a case together in a world where the different superhero universes collide. Their relationship gradually develops, and the pregnancy adds an extra layer of complexity and emotional depth to their story.
I really like the fanfiction 'Male Babs in the Batcave'. It delves into how a male Barbara Gordon would interact with the other members of the Bat - family. It's full of interesting dialogues and a fresh take on the character's relationships within the Gotham universe.
One great 'Batman Barbara Gordon Fanfiction' is 'Oracle Rising'. It really delves into Barbara's transformation into Oracle. It shows her strength and intelligence in a way that's both engaging and true to her character.
One more theme is the exploration of her dual identity. As Barbara Gordon, she is a librarian or a normal citizen, but as Batgirl/Oracle, she is a crime - fighter. Fanfictions play with this duality, showing how she balances her two lives. Sometimes she has to keep secrets from her friends and family, and this creates interesting plot twists and character dynamics.
Lemon fanfiction often involves romantic or sexual themes in a more explicit way. However, when it comes to Barbara Gordon and Helena Kyle, their relationship in fanfiction can be explored in various ways that may not always be so extreme. Some fanfictions might focus on their friendship and how they support each other in their crime - fighting endeavors. They could be depicted as partners who trust one another implicitly, sharing their skills and knowledge to keep Gotham safe. In other fanfictions, there could be a slow - burn romantic relationship developing between them, with the writers carefully building up the tension and connection over the course of the story.
The contrast between their backgrounds also makes for great fanfiction material. Barbara comes from a more law - abiding, scientific background, while Helena has a more chaotic and anti - establishment streak. When combined in fanfiction, it can lead to interesting storylines. They could start off at odds with each other, but gradually come to respect and rely on one another. This kind of character development is very appealing to readers.