One possible analysis could be that it explores the complex relationship between Atreus and his father. It might show their initial meeting filled with a mix of emotions like anticipation, nervousness, and perhaps a bit of fear. The fanfiction could delve into how they communicate, whether it's through words or just unspoken understanding. It could also touch on how this meeting changes both of their characters and their future paths.
Goku's reaction could be a mix of shock and happiness. On one hand, he never expected to actually meet his parents. On the other hand, he has always longed for a family connection. He might start asking them a million questions right away about their lives, Saiyan culture, and what it was like when he was born.