One possible fanfiction could be about how Ellie Bishop's pregnancy changes her dynamic at work in NCIS. Her colleagues might be overly protective or she could struggle to keep up with the physically demanding aspects of the job while pregnant.
One plot idea could be that Ellie Bishop's pregnancy is part of a larger conspiracy. An enemy discovers she's pregnant and tries to use it against her or the NCIS. She has to fight not only to protect herself and her unborn child but also to prevent the enemy from achieving their malicious goals. This would add a lot of action and suspense to the fanfiction while still centering around her pregnancy.
I'm not that familiar with her, but she must be the central figure in this story. Maybe she was someone who went through an extraordinary event related to judgment.
One great 'NCIS LA and NCIS Crossover Fanfiction' is 'The Joint Operation'. It combines the unique characters from both shows really well. The plot usually involves a case that requires the expertise of both teams. It shows how the agents from NCIS and NCIS LA interact, like how Gibbs' no - nonsense approach clashes and also gels with Hetty's more mysterious style of leadership.
Ellie could be a new superhero in training. Maybe she has some sort of power related to energy manipulation. She looks up to Peter and Wade and wants to learn from them. So she gets involved in their adventures and gradually becomes an important part of their team.
One common theme is the cooperation between the two teams. Since they come from different but related agencies, the fanfictions often focus on how they learn to work together. For example, they might have to overcome differences in their investigative techniques.
One great 'ncis ncis los angeles crossover fanfiction' story is 'The Joint Mission'. It combines the characters from both shows in a really exciting way. The story has a great plot that keeps you on the edge of your seat as the teams from NCIS and NCIS Los Angeles work together to solve a complex international crime.
One reason is the expansion of the universe. By crossing over, fanfiction writers can explore new relationships between characters. They can put characters in situations that test their limits and abilities. Moreover, the fans are already attached to the characters from both shows. So when they are combined, it's like a dream come true. It gives a chance to see how the LA - based agents would handle a case that's more in the realm of the original NCIS and vice versa.