One common theme might be the exploration of the characters' growth. Lin and Tenzin would have to adapt to the changes in their relationship and their own lives. There could also be themes related to the support system around them, like how their friends and family react to the news of the pregnancy.
One common theme could be their relationship dynamics. Since they have a complex relationship in the original story, fanfiction might explore different aspects of it, like their past misunderstandings or how they might reconcile.
One common theme is Tenzin learning from Aang. Since Aang was Tenzin's father and also a great Avatar, many fanfictions explore how Tenzin grew under Aang's guidance. For example, Aang teaching Tenzin about airbending techniques or the spiritual side of being an airbender.
I'm sorry, I'm not aware of specific 'lin and tenzin pregnant fanfiction' stories. You can try searching on fanfiction websites like Archive of Our Own or FanFiction.net.
Friendship is a big theme too. Their bond can be explored, how they support each other through tough times, and how they grow as friends. It could involve them having deep conversations, or just having fun times together like exploring new places in the Avatar realm.
A common theme is the exploration of their age - gap relationship. Tenzin is much older, so there's often a focus on how they bridge that gap. Another theme is the clash between Tenzin's traditional airbending wisdom and Korra's more impulsive Avatar ways.
Well, in a 'lin and tenzin married fanfiction', a really interesting plotline could be their journey of self - discovery within the marriage. They might realize new things about themselves through their relationship with each other. Maybe they go on adventures together and during those, they learn more about their love for each other and how they can support one another. They could also have to deal with past traumas or misunderstandings that resurface and they have to overcome them to strengthen their marriage.
One common theme is survival. Since 'The 100' is set in a harsh world, the pregnancy adds another layer of challenge. The characters have to ensure the survival of the mother and the unborn child in a world full of danger.
I'm sorry, I don't have specific 'lin and tenzin married fanfiction' to recommend directly. You could try searching on popular fanfiction websites like Archive of Our Own. There might be some creative stories written by fans about their marriage there.
Love and support are common themes. Usually, Bella's relationship with Edward or other important characters deepens as they support her through the pregnancy.
Another theme is the relationship changes. Her relationship with the baby's father might be explored, whether it's a new relationship or an existing one. There could also be changes in her friendships as she focuses more on her upcoming motherhood.