Finally, in chapter 1010 we had concrete confirmation that Zoro is a Conqueror’s Haki user.
The fact that Zoro has Conqueror’s Haki doesn’t come as a surprise, at all, as it was basically implied.
Zoro is to Luffy what Rayleigh was to Roger: a very close first mate, someone who follows not because weaker but because of sincere trust, a right hand who is almost an equal. Rayleigh was a Conqueror’s Haki user, so it’s simply logical that Zoro has Conqueror’s Haki as well (as the Future World’s Strongest Swordsman is basically the current generation’s version of Rayleigh, just like Luffy is the current generation’s version of Roger).
Also, about Conqueror’s Haki again. If that is a rare ability that allows the user to exert their own willpower over other people, a power that can be wielded by only a few individuals who have the drive to excel as kings… who could have it better than Zoro, who is stone-willed to become the World’s Strongest Swordsman, so to be one of the strongest individuals in the entire world?
So, really, the fact that Zoro has Conqueror’s Haki is just a confirmation of what basically everyone was thinking already.
Oda gave heavy foreshadowing of this, with many references to Zoro’s “strong aura” “killing intent” “demoniac presence”.
So many references that it came to be a concrete foreshadowing of Zoro being a Conqueror.
Conqueror Haki is the “power to overwhelm”:
Just like what Zoro did to Monet:
You can even see the “glare”, the focus on the eye with lines coming focusing on it, just like every time Conqueror’s Haki is used (go and see Rayleigh, Luffy etc etc).
At the beginning of Wano, Urashima wanted to try to take Kiku but decided to not to because he got scared of Zoro’s presence:
Zoro’s will power is so strong and overwhelming that it creates the illusion of his body multiplicating like a demon:
Other Supernovas feel from him a tremendous radiance of killing intent: