Well, there would obviously be the bastards themselves. They could be given names like Joffrey Jr. (even if it's just a fan - given name), a son who has all of Cersei's cunning and a thirst for power. Then there could be a daughter named Myrcella - like, after the real Myrcella but with a different personality. She might be more fierce and independent, not willing to be a pawn in the political games like the original Myrcella.
One possible plot idea could be that Cersei's bastards grow up in secret and form an alliance to take revenge on those who wronged their mother. They might use their wits and hidden identities to manipulate the power dynamics in King's Landing.
Well, one key element could be the complex characters. In fanfiction, authors often explore the backstories and motives of the bastards in the Game of Thrones universe more deeply. Another element might be the power struggles. Since the original series is full of political intrigue, the fanfiction could expand on how the bastards navigate these power - hungry environments. And of course, the setting. The harsh and vividly described world of Westeros in the original serves as a great backdrop for the fanfiction to unfold its own tales.
Sansa Stark could be an interesting pairing. It could be a story of two strong - willed women from opposing sides. They could either become bitter enemies or, in a more creative take, find common ground and form an unexpected alliance. Also, Margaery Tyrell is a great character to pair with Cersei. Their power struggle in the show was fascinating, and fanfiction could take it in new directions, like Margaery actually befriending Cersei and showing her a different way to rule.
Some of the secondary characters could include those who interact with the bastards. It could be a mentor figure, an old knight who takes one of the bastards under his wing and teaches him the ways of war and honor. Or it could be a love interest, a noble lady who falls for one of the bastards despite the social barriers, adding a romantic sub - plot to the story.
In some fanfiction, Jaime's character might develop into a more remorseful figure. His relationship with Cersei could be a source of internal conflict, and he could start to question his loyalty to her more deeply, leading to a change in his actions and decisions.
Yes, there are quite a few out there. Some focus on how Cersei's pregnancy would change her power dynamics in King's Landing. For example, in some fanfictions, her pregnancy makes her more vulnerable to political attacks as her enemies see an opportunity to undermine her while she is in a physically weaker state due to pregnancy. However, the quality of these fanfictions can vary greatly.
There's also 'Jaime and Cersei: The Unwritten Chapters'. This fanfiction fills in the gaps between the events shown in the show. It gives more in - depth exploration of their emotional states, especially during the times when they were separated, and how they coped with the challenges to their relationship.
One interesting plotline could be a bastard of Robert's rising to power in a unexpected way. Maybe he uses his knowledge of the Baratheon family secrets to gain influence. For example, he could expose some hidden affairs or deals that the main families were involved in, which would shake the power dynamics in Westeros.