For Goku, he could gain a deeper understanding of his heritage. Meeting Bardock would make him more aware of his Saiyan side. He might become more confident in his Saiyan abilities. For Bardock, seeing Goku all grown up and powerful could give him a sense of peace. He could realize that his sacrifice was worth it and be proud of the man his son has become.
Goku might develop a more serious side. Bardock's presence could remind him of the harsh Saiyan upbringing. He could start to question some of his Earthling values and find a new balance. Bardock, on the other hand, could develop a softer side. Interacting with Goku, who has a big heart, could make him more empathetic towards others. He might start to see the value in life beyond just fighting and power.
Goku could develop a deeper sense of his Saiyan identity. Knowing his father, he might start to embrace more of the Saiyan warrior spirit. Bardock might change too, seeing the good in the universe through Goku's eyes.
One possible interaction is that Bardock could spar with Goku and Gohan. He'd test their limits and see how much they've learned about fighting. Another could be Bardock sharing stories of Planet Vegeta with them, which would be really interesting for Goku and Gohan to hear.
In the 'bardock sees goku as a god' fanfiction, a plot development could be that Bardock's belief in Goku as a god gives Goku new powers or a new level of confidence. This could lead to Goku taking on more dangerous foes. Or perhaps Bardock tries to build a temple or shrine for Goku. There could also be a conflict where some villains try to use Bardock's blind faith in Goku to their advantage by tricking him into leading them to Goku.
At first, it could be a bit rocky. Bardock is used to the harsh Saiyan ways, while Goku has been raised on Earth with different values. But as they spend time together, they start to understand and respect each other. Bardock could become a mentor to Goku, teaching him advanced Saiyan fighting techniques and Goku could teach Bardock about friendship and love.
At first, it might be tense. Bardock is a hardened Saiyan warrior from a different era, and Goku has grown up on Earth with a very different set of values. But as they start to communicate, they would find common ground in their Saiyan blood. Goku's pure - heartedness could gradually win over Bardock, and Bardock's strength and pride could earn Goku's respect.
In a 'Bardock meets Goku fanfiction', perhaps Bardock is pulled through time and space and lands on Earth during one of Goku's battles. Goku is shocked to see his father but quickly accepts him. Together, they team up against a powerful villain. Bardock shares his Saiyan knowledge with Goku, which helps Goku unlock new powers and defeat the enemy.
One possible plot could be that Goku, through some time - travel or interdimensional rift, meets Bardock in the past. Bardock could initially be suspicious of Goku, not knowing he's his son. But as they interact, Goku might show some of his Saiyan power and spirit that reminds Bardock of his own. They could then team up against a common enemy, like a powerful alien race threatening Planet Vegeta.
Well, one possibility is that Bardock could see the potential in Kid Goku. He might be amazed at Goku's innocent yet strong - willed nature. Maybe he'd start to train Goku in some special Saiyan techniques, which could set Goku on a different path in his power - up journey.
One possible plot could be that Bardock and Gine somehow travel through time or dimensions to meet Goku on Earth. They could be shocked to see how strong and kind - hearted Goku has become, despite not growing up on Planet Vegeta. Goku, in turn, would be amazed to meet his parents and learn more about his Saiyan heritage from them.
Well, perhaps Bardock would first meet Goku's wife, Chi - Chi. She might be a bit wary of him at first, but as Bardock sees how much Chi - Chi loves Goku and their family, he starts to respect her. Then when he meets Goku's son, Gohan, he could recognize the great potential in him, just like he saw in Goku. Maybe he would even offer some Saiyan - style training tips to Gohan.