One common plot idea is Brianne's training journey. It could show her trying to master new powers and overcome her weaknesses. Another idea could be her forming an unlikely alliance with other characters, like Goku or Vegeta, to face a common enemy.
Some fanfics explore Brianne's backstory more deeply. Maybe she has a hidden past or a connection to an ancient power in the Dragon Ball universe. This can add a whole new layer of intrigue to her character. Also, there could be a plot where Brianne participates in a tournament with a different set of rules, which forces her to adapt in unique ways.
One idea could be a story where Goku and Vegeta from Dragon Ball Super end up in the world of Dragon Ball GT by some sort of time - space rift. They then have to team up with the GT versions of themselves to fight a new, powerful enemy that is threatening both timelines.
One common theme is Brianne's power growth. Writers often explore how she could further develop her abilities beyond what we see in the show. Another theme is her relationships, like her interactions with other characters such as the Saiyans or the other universes' fighters.
One idea could be a fanfic where Goku discovers a new form that is a combination of Ultra Instinct and Super Saiyan God. This form gives him unique abilities and a new look. Another idea is to have Vegeta go on a solo adventure to a new planet filled with powerful foes that force him to develop a new fighting style. Maybe also a story where the Z - fighters have to team up with their old enemies like Frieza to fight a greater threat from another dimension.
One idea could be a new villain from an unknown dimension arriving in the Dragon Ball universe. This villain has a unique power that nullifies ki attacks, forcing the Z fighters to rely on their martial arts skills alone.
One interesting plot idea could be the return of an ancient and powerful villain from the Dragon Ball universe that was thought to be long forgotten. This villain could have powers that even the Gods of Destruction are wary of, forcing Goku and his friends to train in new and extreme ways.
A plot could revolve around a group of underdog fighters in Universe 2 who train in secret to enter the Tournament of Power. They face numerous challenges during their training, including a lack of resources and interference from more powerful groups. But through their determination and unique fighting styles, they manage to make a name for themselves in the tournament.
A plot could involve Cooler getting trapped in an alternate dimension where the rules of power are different. He has to figure out how to adapt and escape while also facing off against strange new foes. Or perhaps he discovers a long - lost relative who has a connection to Earth, and this forces him to reevaluate his stance on the planet and its inhabitants.
Well, there could be fanfics that explore Sidra's training methods. Since he is extremely powerful, it would be fascinating to read about how he got to that level of strength. Also, fanfics might feature Sidra in a tournament setting where he has to face opponents he has never encountered before. This could lead to some really intense battles and character development for Sidra.
One idea could be Trunks and Mai going on a time - traveling adventure together to prevent a new threat in an alternate timeline. They could use their combined skills and knowledge to outwit the enemy.
Maybe Raditz gets sent to an alternate universe in Dragon Ball Super. There, he meets different versions of the Z - fighters. He has to team up with them to fight a common enemy that is threatening both universes. This would allow for some cool battles and character development for Raditz as he learns from these new allies.