One great 'Bardock Raditz Saga Earth Fanfic' could be about Bardock arriving on Earth earlier than expected. He might start to train some of the Earth's warriors secretly, changing the course of future battles. This would add an interesting twist to the Saiyan - Earth relationship.
A 'Bardock Raditz Saga Earth Fanfic' might explore what if Bardock survived and came to Earth. He could bring with him the knowledge of Frieza's true intentions. This could lead to a united front between the Saiyans and the Earthlings much earlier, completely changing the Dragon Ball story's trajectory.
There could be a fanfic where Raditz has a change of heart upon arriving on Earth. Instead of following his initial mission, he decides to help the Z - Fighters. In this story, he could use his Saiyan knowledge to train Goku and others in new ways, making them stronger and more prepared for future threats.
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.
First, research the existing lore of the Bardock and Raditz sagas. Know their personalities, powers, and backstories. Then, think about how their presence on Earth would change things. You can start with a simple plot idea, like Raditz teaming up with Goku against a new threat on Earth.
One interesting 'Bardock Raditz Saga' fanfic could be one that delves deeper into Bardock's premonition powers. It might explore how he got them and what other visions he could have had. Another could focus on Raditz's early life on Planet Vegeta before being sent to Earth. There are also fanfics that might rewrite the saga with different outcomes, like Bardock surviving and changing the course of Saiyan history.
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.
You can start by looking on fanfiction websites such as FanFiction.net or Archive of Our Own (AO3). These platforms have a large collection of fan - created works, and you can easily search for 'Bardock Raditz Saga' fanfics using their search functions. Just type in the relevant keywords and browse through the results.
In the 'Bardock Saves Raditz' fanfic, perhaps Bardock discovers a way to time - travel. He goes back to the moment when Raditz is about to die. Bardock could use his own power to shield Raditz from Goku's Kamehameha. Then, they team up and start exploring other planets, trying to find a new place for the Saiyans to thrive, away from Frieza's tyranny.
It could be a story of redemption for Raditz. He starts off as a bit of a villain, but through interactions with Bardock (either as a memory or some kind of spirit guidance) and Goku's influence, he changes his ways. They could all be training together on Planet Vegeta before its destruction, with Bardock teaching them valuable Saiyan combat techniques and life lessons that shape them into the characters we know.
Perhaps the main antagonist could be a new character. This new character could be an ancient evil that has been awakened by the presence of the Saiyans on Earth. They see Bardock and Raditz as a threat to their plans of taking over the universe and thus try to eliminate them.
Bardock's power could be shown as more raw and instinctive. Since he was a pure - blooded Saiyan from a time when Saiyans were more about brute force and conquering. Raditz might have a power level that is in between Bardock and Goku. His power could be more focused on intimidation at first, but as the fanfic progresses, he could develop it further. Goku's power, on the other hand, would be more about growth and adaptability. He learns from his battles and constantly improves, so his power could be shown as evolving more rapidly than the others.
One popular 'Bardock Gohan fanfic' might be those that explore an alternate universe where Bardock somehow meets Gohan during his training on Namek. It could be a story of Bardock mentoring Gohan and passing on his Saiyan warrior knowledge.