Zoro was bound, from the start, to slay the dragon which couldn't be slain by countless samurai before him.
Somehow the "big brains" of the community think that mythical Zoan Kaido can be kept down...
...while literally witnessing all mythical Zoans in this arc on their feet despite all the beatings they took...
Dread it, run from it, destiny arrives all the same and now, it is here!