Like the Attack on Titan guys focusing on that terrible (but amazingly animated) zombie train anime while everyone was screaming for season 2 DP are busy with other stuff in the meantime.

I likewise have been counting the days between One Punch Man season 1 ending and waiting for season 2 to start but I understand that Bones couldn't immediately get on to that. Hell their are certain fights with OPM that are going to cost an absurd amount of money to animate if they're to be done justice and I want them done right.

Jojo can't be rushed, animation takes time and we've already seen in the tv aired versions of many of these bad ass shows that mistakes get made, Killer Queen having that infamously badly drawn face during its first appearance.