It may be worth noting that the very first opening went from Part 6 to Part 1, which makes sense given what happens in Part 6. Still I really hope they do part 7 and 8. I'm currently reading part 5, but what I've heard of Part 7 especially sounds really cool.
I am currently reading Part 7 after blowing through part 5 and 6.
I was not ready. JoJo is the gift that keeps on giving.