Their relationship could develop through training together. As they train, they learn to respect each other's abilities more. For example, Trunks might be impressed by Pan's tenacity and Pan could admire Trunks' strength.
A fanfiction could explore Pan's journey as a Super Saiyan in Dragon Ball GT in relation to her family heritage. She might struggle with the pressure of living up to the Saiyan legacy. Her Super Saiyan transformation could be a turning point where she finally accepts her role and uses her power to protect those she loves, while also learning about the true meaning of being a Saiyan.
Some specialized fan communities or forums dedicated to the relevant fandom might also be a good source. Members there might share or recommend 'gt pan pregnant fanfiction' that they have come across.
In some 'gt pan pregnant fanfiction', the focus could be on the relationships around Pan during her pregnancy. For example, how her partner supports her, or how her friends react. It could explore the different dynamics and how they change as the pregnancy progresses.
The Peter Pan story is quite old. It originated in 1902 and has remained popular throughout the years. Its themes of imagination and childhood adventure have a timeless appeal.
In some fanfictions, there could be a rogue Android. This Android might have been created by a mad scientist and has its own agenda. It could be super - strong and intelligent, constantly devising plans to either destroy Trunks and Pan or use them to achieve its own goals. Maybe it wants to use the Dragon Balls to upgrade itself further and become invincible.