It could be another powerful being from outside the known Dragon Ball universe. Maybe a being from a parallel dimension who sees the Grand Priest as a threat to his own plans for universal domination. Another option could be a rogue Angel who has turned against the Grand Priest and the current order of things in the multiverse.
One idea could be exploring the Grand Priest's past. Maybe he had a different role in the universe long ago. Another could be a story where the Grand Priest has to make a difficult decision that goes against the will of the Omni - King. Or perhaps a story where the Grand Priest trains a new character to become a powerful being in the Dragon Ball universe.
One interesting Grand Priest fanfiction could be one where he has a secret past that is slowly revealed. Maybe he was once a regular Saiyan who was chosen by the gods for a special purpose. This could lead to a whole new perspective on his character and his actions in the Dragon Ball universe.
There is a fanfiction that explores the Grand Priest's origin. It details how he came to be in his position of power. It involves a lot of lore from different parts of the Dragon Ball universe and ties them together in a really interesting way. It's a long read but well worth it if you're interested in the character.
" Dragon Ball: Super Saiyan 10 " was a manga created by the Japanese manga artist Akira Toriyama. It told the story of the main character, Fliesa, who was summoned to become Super Saiyan 10 and fought with Sun Wukong and the others.
Fliesa was an evil cosmic being who had super power and ability. In order to rule the universe, she constantly pursued power. After obtaining the power of Super Saiyan 10, Fliesa became even stronger and fought fiercely with Sun Wukong and the others. In this battle, Fliesa was finally defeated by Sun Wukong and ended his evil reign.
The theme of the story was peace and friendship. It showed the courage and sense of justice of Sun Wukong and others, and also revealed the threat of evil forces in the universe.
Gula was a character in Dragon Ball Super. He was Flisa's older brother and had higher strength and potential than Flisa. Gula appeared in the movie version and Dragon Ball Hero, and showed his powerful combat ability. His form was more advanced than Flisa's, and he had even forced the Super Saiyan into a desperate situation. Gula's strength and potential were obviously higher than Fliesa's, but he disdained to compete with Fliesa for the throne, so he did not become the emperor of the universe. Although Gula appeared in the movie version, his strength and character status made him included in the official history of Dragon Ball. All in all, Gula was a powerful character with potential, and he had a complicated relationship with Flisa.