One interesting plot idea could be that Frieza somehow manages to gain new powers on a distant planet and returns to challenge Goku again. But this time, instead of just brute strength, he uses cunning strategies. Another could be a scenario where Goku and Frieza are forced to team up against an even greater threat from another universe. This would be a great chance to explore their complex relationship.
A possible plot idea is a time - travel fanfiction. What if Frieza went back in time and tried to prevent Goku from ever becoming a Super Saiyan? He could change key events in Goku's past, like interfering with his training under Kami or Master Roshi. Then Goku would have to find a way to regain his power and face Frieza in this altered timeline.
An interesting plot could be that the OC is the last of the Frieza race after a great catastrophe. They are on a mission to rebuild their race but in a more benevolent way. However, other races are suspicious of their intentions, and they have to prove themselves worthy of trust.
A plot could involve a love triangle where Female Frieza has feelings for Goku, but Goku is oblivious and focused on his own goals. Meanwhile, another character is also interested in Goku. This could lead to a lot of comical and tense situations. Or perhaps Female Frieza challenges Goku to a series of contests not related to fighting, like cooking or dancing, to prove she can be better than him in other areas.
One idea could be a time - travel fanfic where Bulma accidentally sends Goku back in time to a period before they met. Goku has to figure out how to get back while also dealing with the differences in that time period. Another could be a story where Bulma creates a new device that gives Goku a new power - up, and they have to test it out against a new, powerful enemy. A third idea is a fanfic set in an alternate universe where Goku and Bulma are the rulers of Earth and have to deal with diplomatic issues with other planets.
A plot could involve Bulma creating a new device that Goku needs to use in order to defeat an extremely powerful enemy. Goku has to learn how to operate this device with Bulma's guidance, and they face many obstacles along the way. This would show their cooperation and how their different skillsets complement each other. It could also lead to some comical moments as Goku tries to understand the complex technology. Another interesting plot could be that they are both transported to an alternate dimension where the rules of the Dragon Ball world are slightly different. They have to figure out how to adapt and find a way back home while also uncovering the secrets of this new dimension.
A plot could involve Caulifla being from a parallel universe where she is the only survivor of her race. Goku meets her during a multiverse tournament and decides to help her. As they train and fight side by side, they develop a deep bond that goes beyond friendship and they explore their new relationship while facing various challenges from other universes.
A possible plot in the 'dragon ball goku and bulma lemon fanfiction' could be that Bulma is working on a project that requires a special ingredient or power source that only Goku can help her find. As they search together, they encounter various challenges like dangerous terrains and powerful creatures. Along the way, their friendship deepens and they learn more about each other's strengths and weaknesses. This could lead to them developing new powers or techniques that they bring back to their friends in their normal world.
A plot idea could be that Goku Jr. discovers a mysterious artifact that has a connection to the Dragon Balls. As he tries to figure out its purpose, he gets caught up in a race against an evil group who also wants the artifact for their own malicious plans. This could lead to him making new allies and having to use his wits as well as his strength. He might also have to face some personal challenges, like doubting his own worthiness to be a hero, similar to how Goku in the original series sometimes had self - doubts.
Perhaps a fanfiction where Vegeta and Goku get transported to an alternate universe. In this universe, their roles are reversed, and they have to adapt to the new situation while still trying to find a way back home. They would face challenges that are unique to this new world and learn from each other in different ways.
One interesting plot idea could be Goku training Caulifla in a new form of Ultra Instinct. This would allow for a deep exploration of their mentor - mentee relationship. Caulifla is already a strong fighter, but with Goku's guidance, she could reach new heights. Another plot could involve them teaming up against a powerful new enemy that neither could defeat alone. They'd have to combine their unique fighting styles and powers to win.
One interesting plot idea could be that Trunks and Goku have to team up to face a new, extremely powerful enemy from another dimension. This enemy has powers that neither of them has seen before, forcing them to quickly learn to combine their unique fighting styles. For example, Goku's Instant Transmission and Trunks' sword - fighting skills could be used in creative ways to counter the enemy's attacks.