Well it didn't feel like any of the final arc was planned out, or maybe it was the original ending he had in mind went out of the window when the manga went on for longer than he originally planned.
Atleast he admits to it, he hasn't changed his answers multiple times, confused the fanbase, piss them off further by actually claiming it was the intended plan all along, or insult the fanbase by claiming certain elements tin the mangat had been present since the beginning were always just red herrings.