Another plot point could be how the reincarnated character interacts with the other Dragon Ball characters. Maybe they have to prove themselves to Goku and Vegeta that they're not just a mindless brute like the original Broly. They could form new alliances or rivalries within the Dragon Ball universe.
One interesting plot point could be the main character adjusting to Broly's immense power. For example, they might struggle at first to control the Saiyan's brute strength during battles.
One interesting plot point could be the protagonist using their prior knowledge to change certain events in Sasuke's life. For example, they might try to prevent Sasuke from leaving the village earlier than he did in the original story.
The plot could revolve around Broly's reincarnation trying to find his place in the ninja world. He might start off as an outcast because of his strange powers. As he tries to fit in, he could get involved in the conflicts between villages. For example, he might be caught in the middle of a war between Konoha and Sand. His Saiyan power could be a key factor in turning the tide of battles.
One interesting plot point could be how the character adapts to the RWBY world with the help of the system. Maybe they use the system to unlock unique abilities or powers that are different from the regular characters in RWBY.
Another plot point might be the relationships the reincarnated OC forms. They could have a different dynamic with Ash's friends like Brock and Misty. The OC might introduce new ideas or ways of thinking to the group, which could lead to some really fun and unexpected adventures.
The reincarnated OC might also change the relationships between the main characters. For example, they could become a close friend to Harry Potter and influence his decisions in a different way. They might introduce new ways of thinking about magic that make the other characters question their own beliefs and practices. This could lead to a whole new dynamic within the group and change the course of the story in unexpected ways.
Well, perhaps the plot involves the reincarnated character trying to change Neo's fate. Since Neo has had a rather tragic story in RWBY, the new character could try to steer her in a different direction. They might also have to face the same enemies Neo did, but with a different perspective due to their reincarnation.
In 'Reincarnated as an Elf', perhaps the interaction between the reincarnated character and other elves is a key plot point. There could be conflicts due to the main character having different values from the traditional elven way of life. Also, the exploration of elven lands and uncovering their secrets might be really engaging.
In this kind of novel, the social interactions can be really interesting. The protagonist, as a monster girl, might face discrimination from some groups but also find acceptance in others. It could lead to a journey of self - discovery and fighting for equality among different species.
Often in these fanfics, the reincarnated character tries to change the fate of some characters. They might be determined to save Sirius Black earlier or prevent Cedric Diggory's death. This alteration of the original plot creates a whole new set of challenges and adventures. Additionally, the way they handle their identity as a reincarnated person within the wizarding world can be full of drama. Do they keep it a secret? How do they deal with the memories of their previous life while living as a new character in the Harry Potter universe?
One idea could be that Broly and Cheelai go on a journey across different planets to discover Broly's true origin. Another could be a story where Cheelai has to protect Broly from some powerful enemies who are after his power. And perhaps a plot where they get stranded on a desolate planet and have to work together to survive.