One popular storyline could be about the character's struggle with the unexpected pregnancy while trying to maintain their social status in the Gossip Girl world. For example, Serena might find herself pregnant and have to deal with the judgment of the Upper East Side society, all while keeping it a secret from her friends and family at first.
Another storyline could be a crossover where a new character is introduced and she becomes pregnant. This new character might be related to one of the main characters in some way. Her pregnancy could then stir up a whole new set of dramas, like who the father is and how it will affect the existing relationships in the Gossip Girl universe.
In some fanfics, Blair could be the pregnant one. Her pregnancy might cause a rift between her and Chuck as they both have to figure out how to handle this new situation. It could also involve her dealing with the competition and gossip from other characters in the story. Maybe she tries to hide it to protect her reputation and future plans.
In some fanfictions, the pregnancy could be a result of a one - time mistake or a rekindling of an old flame. Serena and Nate then have to navigate their feelings for each other, which they may have buried for a long time. They might question whether they are really in love or if it's just the situation that's bringing them together. And as the pregnancy progresses, they start to see new sides of each other that they didn't expect.
One possible storyline could be Blair dealing with the pregnancy while trying to keep it a secret from her high - society friends and family. She might struggle with how it will affect her image and future plans.
In some fanfictions, Blair's pregnancy could lead to her re - evaluating her relationships. Maybe she realizes that she has been too focused on the wrong things and starts to build stronger bonds with her family. It could also be a journey of self - discovery for her as she prepares to become a mother. She might start taking on more mature responsibilities and change her party - girl ways.
One possible storyline could be Nate helping Jenny break into the high - society fashion world. He could use his connections to introduce her to important designers. Another could be them teaming up to expose a scandal in the Upper East Side that involves both of their families.
A common plot in Serena pregnant fanfic could be Serena's pregnancy being unexpected. She then has to rearrange her life plans. She might have to put her career on hold or find a new way to balance it with motherhood. There could also be a story where Serena is part of a community of pregnant women and they all share their experiences, which helps Serena grow and prepare for motherhood.
It depends on the fan community. Some may find it really popular as it combines two interesting elements, 'the garden' and 'Gossip Girl'. But in general, without more specific data, it's hard to say for sure if it's widely popular.
One interesting plot twist could be that Serena discovers she's pregnant but isn't sure who the father is among her many suitors. It could add a lot of drama as she tries to figure it out without ruining her reputation. Another could be that the pregnancy is part of a scheme by an enemy to bring her down, but she ends up turning it around and using it to grow as a person.
One popular storyline in Gilmore Girl fanfic is the 'what if' scenarios. For example, what if Rory had chosen Jess in the end instead of Logan. Another common one is exploring the backstories of minor characters like Lane's bandmates. And some fanfics focus on the relationship between Lorelai and her parents during her teenage years, filling in the gaps that the show might have left.
Some fanfictions might focus on Cece's pregnancy dreams and fears. She could be worried about being a good mother, especially considering her own upbringing. And there could be a storyline where the guys in the loft try to 'prepare' for the baby in their own clumsy but endearing ways, like building a crib that's all wrong at first but they eventually get it right.
One interesting storyline is the on - again, off - again relationship between Serena and Dan. Their relationship was full of drama, from secret hook - ups to public breakups. Another is the power struggle between Blair and Serena for social dominance in the Upper East Side.