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.
One great fanfic idea could be a female Super Saiyan from a different universe arriving in the Dragon Ball Z universe. She could initially be seen as a threat but then team up with Goku and the others to fight a new, powerful enemy. Maybe she has unique abilities that are different from the male Super Saiyans, like a more energy - efficient transformation or a special healing ability while in Super Saiyan form.
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.
A plot could be Gohan using his Super Saiyan 3 form to explore uncharted parts of the universe. He discovers new races and powers, and has to use his form to either protect or learn from them. For example, he might find a race that has a power that can enhance or even rival his Super Saiyan 3 state.
A plot could be that Gohan is suddenly bestowed with the Super Saiyan God power during a moment of great crisis. Maybe when the Earth is on the verge of being destroyed by an unknown force. He then has to quickly learn how to use this power to save the planet. He could face challenges like the power draining his energy too quickly at first, and he has to find a way to sustain it long enough to defeat the enemy.
It could be a rogue Saiyan from a forgotten part of the Saiyan history. This Saiyan might have a grudge against the Z - fighters and their descendants, like Pan. He could have developed his own version of the Super Saiyan 4 power in a more evil way and wants to prove his superiority by defeating Pan.
Well, a really popular one is a fanfiction that I read once where the female Super Saiyan teams up with Goku to fight a new, powerful enemy. It was really cool to see how the author wrote her character, with her own unique fighting style and personality. And then there's this other fanfic that explores what would happen if a female Super Saiyan was the first to reach the Super Saiyan God level. It's full of exciting battles and interesting character development.
A plotline could be where a female Super Saiyan discovers a hidden power within her Super Saiyan form that allows her to time - travel. She uses this ability to go back in time to prevent certain tragedies from happening in the Saiyan history, like the destruction of Planet Vegeta. This would change the entire Dragon Ball Z timeline and create new and exciting story developments.
One idea could be Pan discovers a hidden power within herself that allows her to transform into a unique form related to Super Saiyan 4. Maybe she has to go on a quest to find the knowledge to fully control this power. Another plot could involve Pan traveling to a different dimension where Super Saiyan 4 is the norm and she has to prove herself among stronger Saiyans there.
Another plot might involve Videl's sister being from a different part of the Saiyan universe. She arrives on Earth and has a different understanding of the Super Saiyan form. This could create some interesting interactions as she tries to adapt to Earth's ways while also showing off her unique Saiyan powers. For example, she might have a special technique related to her Super Saiyan form that the Z - fighters have never seen before.