I’d say one or two? It really depends on how Oda wraps up Reverie, and if he allows Kidd/Law to take down Big Mom in Wano (I would personally be okay with this if it were to happen because I want to get to Shanks/Blackbeard)
Thinking about what we need to reach Laugh Tale, it’s the Road Poneglyph that’s supposedly on Wano (which has not been seen yet), and the fourth road Poneglyph which has not been located yet. Once we reach Laugh Tale, there’s probably one more arc to go?
The entire New World is in chaos at the moment, so the race to the Pirate King throne might end up being a straight up bloodbath rather than a series of self-contained arcs, but we’ll see what Oda does.
yup, there's just so many things to cover and wrap up it's hard to picture how it will be done in a satisfying way.