One possible plotline could be that the news spreads slowly across the universe. Different characters react in various ways. Some are in awe of Gohan's power, while others might be jealous. For example, Vegeta could be initially angry that Gohan achieved such a feat instead of him, but then gradually come to respect Gohan more.
Some social media groups dedicated to Dragon Ball might also be a good place to look. For example, on Facebook groups or Reddit subreddits about Dragon Ball. Fans in these communities are usually quite passionate and helpful. They might be aware of such a fanfiction or could even write one if it doesn't exist yet.
Trunks could also be a popular character in such fanfictions. He might be curious about Gohan's interactions with Cell and get involved in their affairs. His time - traveling knowledge could add an interesting twist to the story. Also, Vegeta could be included. His pride might not allow him to accept Gohan getting too close to Cell and he could try to put an end to their relationship or partnership in the fanfiction.
One idea could be to focus on Gohan's internal struggle during the Cell Games. Maybe he's doubting his abilities even more than shown in the original, and it's through his friends' and family's words of encouragement that he finally finds his resolve.
Well, it could be a story where Videl starts to notice her feelings for Gohan during a training session. Maybe she realizes how much she admires his strength and determination, and those feelings gradually turn into love.
In fanfiction, Gohan could have a secret power that he discovers during the Cell Games. This power could be related to his Saiyan heritage in a new and unexpected way, like being able to tap into an ancient Saiyan ability that no one else knew about. It could completely change the course of the fight against Cell.
In this kind of fanfiction, there could be a lot of shock and disbelief among the characters at first. His friends might feel guilty for not noticing the signs earlier. They would probably become extremely protective of Percy.
The other students could have a range of reactions. Some might be sympathetic and try to befriend Harry more. Others might be afraid, especially if the abuser is still around. But overall, it would create a stir in the wizarding community, and there would be a general outpouring of concern for Harry's well - being.
In this fanfiction, Gohan and Videl might have an interaction where Videl tries to understand Gohan's Saiyan heritage. Gohan could explain it to her, and this could create a deeper connection between them. They could also have a moment where they work together to find a weakness in Cell. Videl's human perspective might give Gohan an idea that he hadn't thought of before.
In a fanfiction centered around Gohan's field trip to the Cell Games, there are so many possibilities. The other Z - fighters could be involved in different ways. For example, Goku might give Gohan some tips on how to handle the situation without revealing too much to his classmates. Vegeta could be there, grumbling about having to deal with a bunch of kids around during a potential battle. And Gohan himself would be in a tough spot, trying to enjoy the field trip as a kid but also being aware of the danger that could erupt at any moment. He might even use this as an opportunity to teach his classmates some valuable lessons about courage and self - sacrifice.