One idea could be to focus on Bardock's perspective before his fateful battle. Maybe explore his thoughts about his son Goku being sent to Earth and his own impending doom. He could have some premonitions about Goku's future role in saving the universe.
Well, perhaps in this fanfiction, Goku Black makes a fatal mistake. He could underestimate Goku's ability to adapt during battle. Goku, being the experienced fighter he is, notices this weakness and uses it against Goku Black. He might use a combination of his signature moves like the Kamehameha in a new and unexpected way that catches Goku Black off - guard, leading to his defeat.
The story could start with Goku being pushed to his limits by Goku Black's attacks. But then, he remembers his training with the Kai's and how they taught him to focus his energy in a more efficient way. He then uses this knowledge to create a more powerful Kamehameha that breaks through Goku Black's defenses and kills him.
Definitely include Bardock's last stand. His heroic yet doomed battle is a crucial part of the Saiyan lore. It could be written in great detail, with Bardock using his full power against Frieza's forces.
In this kind of fanfiction, the power hierarchy in the Dragon Ball universe would be completely shaken. Goku's victory over Beerus could inspire other characters to strive for greater power. New alliances might form, and old ones might break. The Z - fighters could see Goku in a new light, either as a hero or a potential threat. The story could also explore Goku's moral compass. Killing Beerus, a god, might make Goku question the limits of his power and the responsibility that comes with it. There could be a lot of internal and external conflicts that make for an exciting fanfiction.
Well, in the original Dragon Ball series, Beerus is an extremely powerful god of destruction. For Goku to kill him in a fanfiction would be a huge shock. However, in the realm of fanfiction, anything can happen. Fanfic writers often like to explore 'what - if' scenarios that deviate from the official canon. It could be interesting to see how the writer would justify Goku achieving such a feat, considering Beerus' overwhelming power.
Well, in a normal sense, Naruto and Goku are from two completely different fictional universes with their own rules and power systems. But in the realm of fanfiction, anything can be made possible. Writers can create all kinds of scenarios where Naruto could potentially 'kill' Goku. Maybe they could give Naruto some super - powered, out - of - character abilities or find a really strange and contrived way to make it happen. However, it would go against the typical power levels and natures of both characters in their original stories.
A plot could involve a power - hungry villain who tricks Naruto into believing that Goku is a threat to his world. The villain gives Naruto a weapon that can disrupt Goku's energy. Naruto, believing the false information, attacks Goku. Goku, not wanting to harm Naruto at first, holds back. But as the fight progresses, Naruto manages to use the weapon and deal a fatal blow. Or perhaps there's a tournament across different universes where the rules are twisted, and Naruto, in order to protect his friends in the Naruto universe, has to eliminate Goku who is unbeatable in normal circumstances.
I haven't actually read this specific 'piccolo and gohan lemon fanfiction', but generally, in fanfictions involving these two characters, it might explore their relationship in unique ways. It could be about their friendship evolving, or perhaps their teamwork in new and unimagined scenarios within the Dragon Ball universe.