One possible plot could be how Jon and Susan deal with the unexpected pregnancy. Maybe they initially struggle with the news but then gradually come to terms with it and start preparing for the baby's arrival.
A more complex plot could be that there are some misunderstandings during the pregnancy. Perhaps Jon is wrongly accused of not being supportive enough, and they have to work through these issues to strengthen their relationship for the sake of the unborn child. This could involve a lot of emotional turmoil and growth for both characters.
There could also be secondary characters like their best friends. For instance, if Susan has a really close female friend who has been through pregnancy before, she could play an important role in giving advice and support. And on Jon's side, maybe he has a brother who is either very helpful or causes some trouble during this time.
Maybe in a fanfiction, Susan Bones has a pet lemon - like a magically animated lemon. It follows her around and helps her solve mysteries at Hogwarts. For example, when there are strange disappearances in the school, the lemon uses its unique scent to track down clues.
In some fanfiction, Jon Snow and Myrcella could form an alliance to bring peace between the North and the South. Myrcella, being a princess, has the influence in the South, and Jon has the loyalty of the North. They work together to end the feuds and power struggles, and along the way, they develop a deep friendship that might turn into something more romantic.
One interesting plot could be the journey of Jon and Sansa as they adjust to becoming parents. Maybe they face challenges from the political situation in their world while trying to protect their baby. For example, they have to deal with rival factions who might see their baby as a threat or a tool for power.
Well, in some 'reincarnated as jon snow fanfiction', there might be a plot where he changes the political landscape of Westeros much earlier. He could use his knowledge of different leadership styles to gain more allies and make smarter decisions. Also, there could be a plot where he has a different relationship with the White Walkers. Maybe he tries to communicate with them instead of just fighting, due to his different perspective from being reincarnated.
In some 'jon snow reborn fanfiction', an interesting plot could be that Jon Snow is reborn with newfound powers. For example, he might be able to control the elements, which he uses to defend the North from new threats that are even more powerful than the White Walkers. He could also have a deeper connection with the Old Gods, allowing him to communicate with them more directly and gain their wisdom for leading the people.
One plot could be that Jon Snow somehow gets transported into the Pokemon world. He might use his combat skills and leadership abilities to form a team of Pokemon trainers and battle against an evil organization. His sense of justice would fit well in the Pokemon universe.
Perhaps a plotline where they try to keep the pregnancy a secret at first. This could involve them hiding it from their allies and enemies alike. They might be worried about how the news would affect their standing in the various power struggles. Daenerys could fear that it makes her seem weak, while Jon might worry about the reaction of the Northern lords.
Some fanfictions could focus on the emotional journey of Sansa being pregnant. She might be scared but also excited about having a child with Jon. Their relationship could grow stronger as they prepare for the new life together, with Jon being very protective.
One interesting plot could be the twins growing up in a post - war world. They might inherit the leadership qualities of their parents, Jon and Daenerys. The story could focus on how they are trained to rule and bring peace to the Seven Kingdoms.