2-3 chapters should be more than enough to wrap it up, no more dragging
Highly depends on:
- Kaido having awakening too like Luffy (his dragon zoan having its "own" spirit now).
- Kaido's flashback
- How much fighting Oda wants to show in the midst of every other character plot.
I still think we have roughly 10 or so chapters left (not just straight fighting, but scenes with Zunisha, CP-0, Denjiro, etc), aka all or most of Volume 104.
Let's see what Kaido does in response to this first