Well, one key event is Goku's early battles against various foes. He faces off against enemies like Raditz. Another important part is his training and growth in power during this part of the story.
A plot could revolve around a time - traveling character who goes back to the time of the Tenkaichi tournaments in Dragon Ball Z. This character could accidentally change some events, leading to a whole new set of battles and power - up scenarios. Maybe Goku doesn't get the senzu beans he needs at a crucial moment, forcing the other fighters to step up more.
Vegeta is also highly popular. His pride and his journey from villain to anti - hero are rich areas for fanfiction. Writers can delve into his internal struggles, like his constant need to prove himself stronger than Goku while also dealing with his new - found family on Earth.
There are no such inappropriate 'Straight Shota' stories in the official Dragon Ball Z canon. Dragon Ball Z mainly focuses on epic battles, power-ups, and the adventures of Goku and his friends to protect the Earth from various villains.
Dragon Ball Z is both anime and manga. The anime was adapted from the manga and they share the same story and characters, but presented in different mediums.
One alternative is to focus on character backstories. You could write about the early days of Piccolo, how he came to be the way he is. Another option is to do crossovers with other non - sexual universes. Maybe a story where the Dragon Ball Z characters meet characters from a magical anime world and they have to work together to solve a problem. Also, you can write about the relationships between the characters in a platonic way, like the deepening of the friendship between Gohan and Krillin.