One challenge would be acceptance from their respective communities. The heroes might not accept Nightwing being involved with Harley, a former villain. And the villains might see Harley as a traitor for being with a hero. Another challenge could be protecting the pregnancy from their enemies who might want to harm them or use the baby for their own gain.
Well, the plot could involve a strange experiment that causes Harley Quinn to become pregnant. Nightwing gets involved because he's trying to figure out what's going on. As the story progresses, they have to deal with villains who want to use the baby for their own evil purposes. They might also have to deal with their own personal issues, like Harley's past relationship with the Joker and Nightwing's loyalty to Batman.
One great 'oc x Harley Quinn fanfiction' is 'Harley's New Ally'. In this story, the original character (oc) is a vigilante who crosses paths with Harley Quinn. They start off as enemies but gradually develop an understanding. The author does a great job of capturing Harley's complex personality and how the oc challenges her views. It has some really interesting action scenes and character interactions that make it a fun read.
A good 'oc x Harley Quinn fanfiction' often has unique plot twists. Maybe the oc has a secret that changes Harley's perception of them completely. Or perhaps Harley has a goal that the oc initially opposes but later comes to support. The story should also have good writing in terms of grammar and style. If the writing is sloppy, it can be really hard to get into the story. And the fanfiction should explore the themes that are relevant to Harley Quinn's character, like freedom, madness, and the search for identity, through the relationship with the oc.
Another great writer is 'DeadlyHarley'. They are excellent at writing the banter between Harley Quinn and Deadpool. Their stories often feature really funny and witty exchanges between the two characters, making the reading experience very enjoyable. There are also new and upcoming writers who are making a mark. Writers like 'PoolAndQuinnNewbie' might not have a huge following yet, but their fresh take on the relationship between Harley and Deadpool is really interesting, bringing in new ideas and perspectives to the fanfiction world.
In Harley Quinn x Joker fanfic, the character development is often a focus. Harley's transformation from a psychiatrist to a criminal sidekick is interesting. Writers may play with different timelines and scenarios in the fanfic. For example, they might explore what would happen if Harley finally broke free from the Joker's influence earlier than in the original story. This can lead to various plot twists and new character arcs for both Harley and the Joker.
One common theme is the clash of their different worlds. Percy is from a world of Greek gods and monsters, while Harley is from the DC superhero/villain world. Another theme could be redemption, like Harley trying to find a new path with Percy's help. Also, friendship or an unlikely alliance is often explored.
There are some. However, the quality can vary a great deal. Some might focus on the contrast between Percy's heroic and somewhat naive nature from his world and Harley Quinn's chaotic and unpredictable personality from the DC universe. It really depends on what kind of story you're looking for. If you like stories that blend different mythologies and modern superhero concepts, you might be in for a treat.
Perhaps the fanfiction could revolve around a love triangle. The reader is caught between Harley Quinn and another well - known Gotham character, like the Joker. This would create a lot of tension and drama as the reader has to decide between Harley's wild charm and the allure of the other character. It would also test Harley's possessiveness and loyalty.