User blog comment:HalerN/NEW REVIEWS!/@comment-1668079-20100916051526

The Bardock and King Vegeta thing is where a lot of fans get confused. Let me clear it up:

They were part of the group of Saiyans that wished for Serroli to be killed. When Shenron split Serroli in two and made it so those two bodies would not be born again for thousands of years, he chose the two most powerful ones there and gave the power necessary to destroy Serroli if he ever came again. Shenron then killed Bardock and K Vegeta, and made it so they would reappear again when Serroli's halves were born again.