I'm just here to remind you that Zoro still has to take a go at Kaido with his full arsenal.
Up until now he only landed two attacks on panel.
Oni Giri without Haki
Tatsumaki with Haki (that cut Kaido's scales despite being an AoE attack)
Get ready, the Grandmaster hype train hasn't reached destination yet, there is still time to jump on.