Perhaps the fanfic is about Buu waking up and being confused by the events of the Cell Saga. He might not understand the conflict between the androids and the Z - fighters. So, he could start interacting with different characters in his own strange way, like befriending some of the minor characters or causing unexpected mayhem just because he doesn't know any better.
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.
I think 'Raditz Cell Games Fanfic' is quite interesting. It might explore the story from Raditz's perspective during the Cell Games. It could include his thoughts on the powerful fighters, his own role in the events, and how he views the whole Cell Games scenario. Maybe it also has some unique interpretations of the power dynamics and character relationships in the 'Dragon Ball' universe during that time.
It could be someone from Goku's past who has a vendetta against him and takes advantage of the chaos during the Cell Games. For instance, an old enemy who was thought to be defeated but managed to come back stronger and wants to finish Goku off while he's weakened from the fight with Cell.
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.
One possible fanfic could be about Goku's intense training before the Cell Games. He might be shown pushing his limits in the Hyperbolic Time Chamber, trying out new techniques and forms to defeat Cell. Maybe he discovers a new power level that no one, including himself, expected.
Goku is always a popular character in cell games fanfiction. His power and determination make him a central figure. Vegeta is also popular as his complex personality and rivalry with Goku can be explored further. Cell himself is often a key character, with fanfiction sometimes delving deeper into his motives and backstory.
The Cell Saga has intense battles, power-ups for the heroes, and the emergence of Cell as a major threat. It's full of exciting moments and character growth.