Great find
Personally i don't believe it hints towards Arcs, but actually Three Separate Destinations Post-Wano
Long before this OP came out, i said that after Wano, SHs are gonna be divided into Three Islands
I think we are gonna see Mary Geoise Short Arc, Impel Down Short Arc & Vegapunk Island Short Arc simultaneously
After that, Fishmen Island will be Destroyed & then escape from Marine HQ
All of these locations will be Highlighted in a Short Arc (2 Volumes) Post-Wano
After that, they all go to Elbaf together