Perhaps Gohan sacrifices himself to save the other Z - fighters. He might choose to take on Cell's full - power attack that was meant for all of them, and in the process, he loses his life. In the fanfiction, it could also be that Cell has some sort of hidden power - up that catches Gohan off - guard and leads to his death.
Another scenario could be that Gohan contracts a deadly and incurable disease in the fanfiction world. Despite the efforts of his family and friends, including the use of any available advanced technology or magic, he succumbs to the illness, leaving everyone in mourning.
In this fanfiction, if Gohan dies in the Cell Games, perhaps the story could focus on how the other characters cope with the loss. For example, Chi - Chi could become a more hardened character, vowing revenge on Cell or any other threats. Piccolo might take on a more fatherly role to Goten, trying to train him to be as strong as Gohan was. And the Earth might be in a state of mourning, which could attract new villains who see it as a time of weakness.
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.
Well, the story could take a very different turn. Gohan was a symbol of hope for a new generation of fighters. His death would shatter that hope. The remaining Z - Fighters would have to reevaluate their strategies and training methods. Maybe they would start to focus more on group attacks rather than relying on individual powerhouses like Gohan. And the fanfiction could explore how the other characters grow and change in the face of this great loss. They might also seek new allies or ways to resurrect Gohan, which could lead to all kinds of new adventures and challenges.
If Gohan dies in the Cell Games in fanfiction, Goku and Chi - Chi's relationship would be severely strained. Goku might blame himself for not being able to protect their son, and Chi - Chi would be heartbroken and potentially angry at Goku. Vegeta's relationship with Goku could also change. He might respect Goku more for his pain, or he could become more competitive, vowing to never let his own family be in such a position.
The story could progress with a darker tone. There would be a lot of mourning at first. Then, the remaining characters might start to look for ways to prevent future threats more aggressively. For example, Bulma could use her scientific skills to develop new weapons or defenses.
One possible scenario could be that Naruto was severely injured in a battle, perhaps against a powerful new enemy. He was brought to the hospital, but his injuries were too grave to be healed, and he passed away surrounded by his friends and family, leaving everyone in deep sorrow.
One possible scenario could be that Luffy sacrifices himself to save his crew during a major battle against an extremely powerful enemy. He might use all his strength and energy to protect them, and in the end, it's too much for his body to handle.
Perhaps in a fanfiction, Gohan dies protecting his family. He stands against a powerful foe that targets his loved ones. He endures a brutal battle, but in the end, his injuries are too severe. His death shatters his family and friends, and the Z - fighters are left to pick up the pieces and continue the fight without him.