The theme of hope can be prevalent. The baby could represent a new beginning and a symbol of hope for their future. It might also explore the idea of legacy, as they think about the kind of world their baby will grow up in and what they can do to make it better. Maybe they want their baby to carry on their heroic legacies in some way.
One interesting Oliver and Felicity baby fanfiction could be about their journey of preparing for the baby. It might include them decorating the nursery, choosing baby names, and dealing with the excitement and nervousness of becoming parents.
Oliver would likely use his skills from being a vigilante to protect his family. He might set up high - security measures at home. Felicity could use her tech - savvy to monitor the baby while they are out on patrol. They would also have to rely on their friends and allies to help out when they are dealing with threats in the city.
Perhaps there's a story of a prank where a group of friends dared someone to dress as a baby girl on the train. As they rode along, different reactions from fellow passengers ensued, some laughing, some giving strange looks. It could also lead to interesting conversations with curious onlookers.
I think a good way is to think about what kind of personality traits Baby Hiccup would have and build the story around that. For example, if he's particularly brave or mischievous, and how that affects his dragon-training journey.
Baby Toothless fanfiction can take various forms. It could be set in an alternate universe, show unseen moments from the original story, or imagine what happens after the events of the movie.
One possible storyline could be that Oliver Queen is transported to the wizarding world during a fight in Star City. He stumbles upon baby Harry Potter and realizes the importance of protecting him. He then has to learn about the wizarding world quickly to keep Harry safe from the dark forces. Another storyline could be that the wizarding world somehow contacts Oliver for help in protecting Harry. Oliver brings his skills and knowledge from his own world to the task.
I'm not sure of specific 'Oliver and Laurel baby fanfiction' titles offhand. You could try searching on fanfiction websites like Archive of Our Own. There might be some heartwarming stories there about their fictional family life with a baby.
One possible plot could be that Kara and Oliver meet during a superhero crossover event. They initially start as friends, but over time, their relationship deepens into love. When they find out Kara is pregnant, they face challenges. Oliver has to balance his duties as a hero in Star City while also being there for Kara. They might also face opposition from their respective friends and allies who worry about how a baby will affect their superhero lives. But through it all, their love for each other and their unborn child gives them the strength to overcome these obstacles.
You can start by looking on popular fanfiction websites like Archive of Our Own. Use the search function and type in 'Oliver and Felicity baby'. Check the ratings and reviews of the stories to find the good ones.