It could be about a future where the Dragon Ball universe is in a state of extreme cold. Maybe Freeza's race has somehow managed to freeze the entire universe and the Z - fighters have to find a way to reverse it. They might have to search for a new set of Dragon Balls that are immune to the cold or find a way to defeat Freeza's descendants who are controlling this frigid state.
Gohan could be the main character. Since he has great potential and is intelligent, in this frigid future, he could be the one leading the fight against the cold - related threats. He might use his skills as a scholar and a fighter to find solutions to the problems in this frozen world.
The plot could involve Hibari Kyoya being a hidden descendant of an ancient race in the Dragon Ball universe. He discovers his heritage and with it, a great power. However, there are those who want to use his power for evil. So, he has to train hard and also rely on the help of his new friends in the Dragon Ball series, like Vegeta and Gohan, to fend off the bad guys and protect his new - found identity and power.
Well, it could be about Cabba and Caulifla training together and facing a new powerful enemy in the Dragon Ball universe. Maybe they discover a new form or technique during their training sessions.
In this fanfic, Gohan might encounter different versions of his friends and enemies. He could see how the future has been shaped by past events. Maybe he meets a future version of himself who has become much stronger or has different values.
Well, the plot could involve the Z - fighters teaming up with the Justice League to fight a common, extremely powerful enemy. Maybe Darkseid teams up with Frieza, and their combined forces are too much for either group alone. So, Goku and Superman start training together to learn from each other's strengths, like Goku learning about Superman's heat vision and Superman learning Goku's Instant Transmission.
A possible plot could involve an enemy who discovers Android 18's ticklish feet and tries to use it as a distraction during a fight. However, Android 18, being the strong - willed character she is, manages to overcome this odd form of attack and turn the tables on the enemy. This would add a unique and humorous twist to the typical Dragon Ball battles.
One possible plot could be that the villains from GT, like Baby, somehow find a way to cross over into the Super universe. Goku and Vegeta from Super would then have to team up with their GT counterparts to stop Baby from taking over the entire multiverse. They would need to combine their powers, like Super Saiyan Blue and Super Saiyan 4, to stand a chance against this powerful foe.
In a 'Full Moon Blues Dragon Ball Fanfic', it could center around the idea of a hidden or lost Dragon Ball that only reveals itself during the full moon. A group of characters, perhaps some new ones along with the old favorites, go on a quest to find this Dragon Ball. Along the way, they face various challenges, like battles with new types of creatures or dealing with the power - hungry villains who also want the Dragon Ball for their own evil purposes.
One possible plot could be Goku and Vegeta taking a moonlit stroll together, initially in silence as they are both lost in their thoughts about their latest battles and power-ups. Then, they start to have a deep conversation about their families and how their lives have changed since they first met. This could lead to them realizing they have more in common than they thought, strengthening their unspoken bond.
The plot might involve a villain who has the ability to steal both ki and chakra. This forces Goku and Naruto to team up. Goku, with his Super Saiyan forms, provides brute strength, while Naruto, with his various jutsu like Rasengan and his Sage Mode, offers strategic combat skills. They would have to combine their powers in unique ways to defeat this new threat.