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.
Yes, there might be. The Naruto fandom is quite large and creative, and combining it with Linkin Park's music can lead to some very interesting fanfiction ideas. Some fans might write stories where Naruto sings Linkin Park songs as a form of self - expression or to bond with other characters in the Naruto universe who also like that kind of music.
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.
A Kryptonian in the Dragon Ball Z universe could potentially be a very powerful addition. Their natural abilities like super strength, flight, and heat vision could make them a force to be reckoned with. However, they would also face challenges as the Dragon Ball Z world has its own power scale with ki-based powers. They might have to adapt to the different fighting styles and power sources. Maybe they could learn to use ki in addition to their Kryptonian powers, or they could find a way to combine the two in unique ways.
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 interesting crossover could be a battle between Hulk's brute strength and Goku's Super Saiyan power. Maybe in the fanfic, they start off as rivals, with Hulk misunderstanding Goku as a threat to Earth. Their fight would be epic, with Hulk's limitless rage against Goku's increasing power levels. It could also explore how their different universes' power systems interact.
Some Linkin Park fanfics are centered around the concept of time travel. They might take the reader on a journey where a fan travels back in time to meet the band during their formative years. This could involve interesting interactions with the young and aspiring band members, and perhaps even influencing their musical journey in some fictional way. There are also fanfics that focus on the relationships within the band, like the friendship and creative synergy between Mike Shinoda and Chester Bennington.