Another possible ending is that Gohan sacrifices himself to defeat Cell. He could use a self - destructive move that not only takes out Cell but also costs Gohan his life. This would be a very dramatic and tragic ending, but it would also show Gohan's selfless heroism.
In many fanfictions, Gohan's battle with Cell is often depicted with intensified emotions. Gohan might show even more of his hidden power, perhaps unlocking new forms or techniques that were not in the original series. This can make the fight more exciting and unpredictable.
One idea could be Gohan in his Super Saiyan 4 form facing a new, powerful enemy from another dimension. He could struggle at first to control the raw power of this form while also trying to protect his friends and family. Maybe this new enemy has the ability to nullify the Saiyan's energy attacks, forcing Gohan to rely more on his martial arts skills that he learned from Piccolo.
In a fanfiction, Gohan as Super Saiyan 3 could be involved in a time - travel adventure. He travels back to a crucial point in Dragon Ball Z history and has to use his Super Saiyan 3 powers to change certain events. This could lead to a whole new timeline where things are different. For example, he might be able to prevent the destruction of Planet Namek or save some characters who originally died.
Dragon Ball Super vs GT in fanfiction can lead to some really interesting character developments. The different timelines and power systems in both series offer a lot of room for creativity. In some fanfictions, the younger characters from Super might meet their older counterparts from GT. This can create a contrast in personalities and fighting styles. For example, Trunks in Super is more used to the modern power-ups and technology, while Trunks in GT has a more 'old - school' approach. Fanfic authors often use these differences to create engaging stories that explore not only the battles between the two series but also the underlying themes and character growth.
Obviously, Cell himself is one of the most popular characters. Since the fanfic is centered around him, fans love to explore his character further. Goku also remains popular as he is often pitted against Cell in these fanfics. Vegeta is another one. His rivalry with Goku and his own quest for power make him a great addition to any story involving Cell. And then there's Trunks, who has his own unique abilities and backstory that can be intertwined with Cell's story in interesting ways.
Well, one interesting concept could be new power - up forms for the characters. For example, a fanfic might introduce a unique form for Cell that combines the abilities of different Saiyans in a completely unexpected way. Another concept could be alternate timelines where Cell has different fates. Maybe in one timeline, he becomes a hero instead of a villain. And also, there could be concepts about Cell's family or origin that are explored more deeply, like his creator having some secret motives that are not shown in the original series.
In this fanfiction, perhaps Cell returns with an army of his own clones. He could be seeking revenge on the Z - fighters for his previous defeat. The story might focus on how the heroes train to face this new threat from Cell. It could also introduce new characters who team up with the Z - fighters to take on Cell and his clones. There could be a lot of intense fight scenes and power - up moments.
Family relationships are also a big theme. His relationship with Videl, his daughter Pan, and of course his father Goku. Fanfictions often explore how Gohan balances his family life with his role as a Z - Fighter. For example, there could be stories about how he teaches Pan about her Saiyan heritage while also dealing with threats to the Earth. There are also stories that focus on his relationship with Goku, like how Gohan continues to be inspired by his father or how they train together to face a new powerful enemy.
One idea could be Gohan struggling to control the new power of the Super Saiyan God. He might accidentally cause some destruction while training and then have to deal with the guilt and the fear of his power getting out of control.