Since seasons pass and man evolves during his life, I think it's important to build what we call the "theme of a work" by basing oneself on the foundations of their previous works, and that wanting to cut oneself one from that past is a mistake we shouldn't make.
Thus, in Steel Ball Run, you will meet characters whose names are similar to some protagonists of the "JoJo's Bizarre Adventure" saga. I'd want you to see them as incarnations from a parallel universe, and not as ancestors.
However, the theme of this part stays the same, an eulogy of the human. Let's see together what will happen to these people plunged in that strange race that is life!