Their relationship could become even closer. With a baby on the way, they would have to rely on each other more. Flynn would become more responsible, and Rapunzel would see a new, tender side of him.
In fanfiction, if Rapunzel and Flynn were pregnant, it could be a story full of anticipation. They might face new challenges together. Flynn would likely be overprotective, and Rapunzel would be excited to bring new life into the world. Maybe they'd start preparing a special nursery in their new home, painting the walls with beautiful murals.
To write a fanfic focusing on their friendship, start with a simple moment like them sharing a meal together and reminiscing about their adventures. You can then add some conflict, maybe Flynn has to go on a dangerous mission alone but Rapunzel doesn't want him to go. Show how they communicate and work through their differences. For example, Rapunzel might use her charm and wisdom to convince Flynn to let her come along or at least to be more careful. They could also have inside jokes that you sprinkle throughout the story to show the depth of their bond.
Well, the fanfiction could start with Rapunzel having some strange symptoms. When she realizes she's pregnant, it could be a time of great joy for her and Eugene. But then, there are rumors spreading in the kingdom about the baby. Some might think it's a bad omen or have other superstitious beliefs. Rapunzel and Eugene would then have to work together to prove that their family is a positive addition to the kingdom and face all the difficulties that come with the new situation.
I'm not sure specifically as there could be many different interpretations in such a fanfiction. It might involve a character named Rito facing a stabbing incident, perhaps in a battle, a crime scene, or a situation of betrayal.
It could be some of the nobles in the kingdom who are not happy with the idea of Rapunzel having a baby so soon. They might fear that the baby will disrupt the line of succession or cause political unrest. So they try to undermine Rapunzel and Eugene during her pregnancy, creating all sorts of problems for them.
It could be a rogue angel. There are always some angels in the Supernatural universe who oppose Castiel's ideas or actions, and they might see stabbing him as a way to get rid of him or send a message.
In such fanfiction, characters might show shock. For example, Dean could be horrified when he sees Castiel stabbed, his eyes wide open and his face pale.
Well, in 'naruto gets stabbed fanfiction', it could be that Naruto is exploring a new and dangerous area where he encounters a powerful and hostile ninja. In the heat of the fight, this ninja manages to land a stabbing blow. It might also be that Naruto is weakened due to some prior injury or chakra depletion, making him more vulnerable to being stabbed by a regular enemy. And, there could be a situation where Naruto is under the influence of some sort of genjutsu that impairs his ability to defend himself and thus gets stabbed.