Well, it could be a wild plot where Naruto, being Vegeta's brother, might introduce Saiyan powers into the Naruto universe. Maybe Naruto has to deal with the expectations of being a Saiyan while still maintaining his ninja ways.
If Naruto was Vegeta's brother in this fanfiction, Goku would probably be quite curious. He might see Naruto as a different kind of Saiyan. And Naruto's friends in the ninja world would be really confused at first. They'd be like, 'Who are these Saiyans and why is Naruto related to them?'
Well, it would be a really wild concept. Naruto's ninja world and Vegeta's Saiyan heritage are so different. Maybe Naruto would teach Vegeta some ninja skills like stealth and using chakra in unique ways. And Vegeta might introduce Naruto to Saiyan combat techniques. It could be a story full of clashes between their different values and powers, but also of them learning from each other.
At first, Vegeta might be resistant to having Naruto as an older brother. But Naruto's determination could win him over. Naruto would likely encourage Vegeta to use his power for good. And Vegeta might start to respect Naruto's way of handling things, gradually leading to a closer bond.
If you like the story of crossing the Dragon Ball world and becoming Vegeta's brother and showing supreme power, then I recommend the book "Dragon Ball Attack on Latiz" to you. In this novel, the protagonist became the most tragic brother of the male protagonist in history, Raditz, but he was not recognized and suppressed. However, he did not give up. Instead, he became more and more motivated, displaying his powerful strength and finally becoming the strongest in the universe. I hope you like my recommendation.
Perhaps Vegeta Jr could challenge Vegeta to a sparring match. Vegeta, being the proud warrior he is, would accept. During the fight, Vegeta Jr might display some new techniques he's developed, which could both surprise and intrigue Vegeta. And in the end, they could form a stronger bond as they realize they share the same values and goals as Saiyans.
Since we should avoid the 'lemon' aspect which is often not appropriate, in general Vegeta is usually depicted as a strong and proud character. He might be shown as a mentor - like figure to Pan in fanfiction. Pan, on the other hand, is often a curious and energetic character. In non - inappropriate fanfictions, their relationship could be one of mutual respect and growth, with Pan looking up to Vegeta for his power and experience.
The book Dragon Ball: This Cyborg Is Super Strong was written by Vegeta's younger brother.😋I recommend the following novels to you: Dragon Ball Attack of Latiz, Dragon Ball Ring. I hope you like my recommendation.
A possible plot twist could be that Vegeta Jr is actually an imposter sent to deceive Vegeta. He could initially seem like a legitimate Saiyan but gradually reveal his true motives, which might be related to an enemy's plan to take down Vegeta.