Another way is through a common goal. Let's say they are trying to stop Pan from stealing all the magic in Neverland. As they work towards this goal, they have to make sacrifices for each other. Hook might risk his life to save Emma from one of Pan's traps, and Emma might use her magic in ways she never has before to protect Hook. This mutual selflessness would strengthen their bond and develop their relationship further in the Neverland setting.
Well, they could start by relying on each other's skills. Hook's knowledge of Neverland and his sailing expertise, combined with Emma's magic, would make them a formidable team. As they face danger together, like escaping from a giant sea creature or finding a way through a maze in the jungle, they start to trust each other more, which deepens their relationship.
The relationship would likely become deeper. Hook would be more protective of Emma, always by her side. Emma might see a new side of Hook, a more tender and responsible side, which would make her fall more in love with him.
One popular trope is 'Enemies to Lovers'. Captain Hook and Emma start off at odds with each other in the show, and fanfiction often plays on that dynamic, gradually turning their relationship into a romantic one. Another is 'Time Travel'. Writers might send Emma or Hook back in time, which changes the course of their relationship and creates new and interesting scenarios.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a vast collection of Once Upon a Time fanfictions. Just type in 'Captain Hook and Emma' in the search bar, and you'll get numerous results. You can also check out FanFiction.net, which has been around for a long time and has a lot of fan - created content related to this pairing.
In another scenario, both Captain Hook and Emma Swan are held for ransom by a new and powerful villain in their world. They have to work together, using their combined skills and the power of their relationship, to escape from captivity. This could involve Hook using his pirate wiles and Emma using her magic. They might also find unexpected allies along the way who help them in their quest to avoid paying the ransom and defeat the villain.
Adventure is also a big theme. They are often on some sort of quest or journey together. For example, they might be searching for a magical artifact while also dealing with their feelings for each other. And there's also the theme of trust. Since they come from different sides, learning to trust each other is a crucial part of many fanfics.
One common theme is redemption. Captain Hook often has a past full of misdeeds, and in these fanfics, his relationship with Emma Swan can be a part of his journey towards redemption. For example, in many stories, he tries to change for her.
One plot idea could be that Captain Hook and Emma Swan find themselves in a race against time in Neverland. They have to retrieve a magical artifact before a dark force uses it to destroy all the realms. Along the way, they face challenges from the Lost Boys and some of Hook's old enemies.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you're likely to find many about Captain Hook and Emma Swan having a baby there.
There are quite a few out there. In some fanfictions, like 'A New Beginning for the Hook - Swan Family', it delves into how their relationship evolves with the addition of a baby. It might show Hook being overly protective and Emma being the more practical one when it comes to raising their child. The story could also involve their friends from Storybrooke helping them out in different situations.
Perhaps they are in the middle of a new adventure when Emma realizes she's pregnant. This could add a whole new layer of tension as they not only have to deal with the external threats but also ensure the safety of the baby. They could seek help from their friends in Storybrooke, who have mixed reactions to the news.