JoJo's Bizarre Adventure - Meanwhile, Dio.

I am pretty sure that that the only series without a direct line to dio (as far as I know) is part 8…and that is only because it is connected to other parts that are connected to dio

1- JOJOOOOO!!
2- The beings that made Dio possible
3- Dio again
4- the aftermath of Dio's little organization
5- Son of Dio
6- Revenge of Dio (via henchman/cultist)
7- Dino Dio…But then IT WAS ME, DIO!

Are we sure this isn't Dio's Bizarre adventures?