This is a lot to unpack. I was expecting a fairly uneventful fight chapter, but there's quite a bit to dig into.
The fact King's race's name was hidden is interesting. Probably the juiciest bit of info, but I won't hold my breath. The fact King's fire is being talked up so much probably means there will be a scene of King unleashing a wildfire across the whole performance floor, and Zoro will cut it. No one besides the Yonko and Worst Gen 5 know Zoro can cut fire, so it will come as a shock. That may even spark more interest in Hyogoro and Kawamatsu, that Zoro mastered a technique Kin'emon probably spent his whole life trying to achieve.
Slowly, the Samurai are starting to recognize Zoro as the next prodigal warrior of Wano.
But best of all, there's even more proof that Zoro is indeed a Shimotsuki. In an SBS, Oda teased Zoro's bloodline in relation to the Shimotsuki, and now we have characters noting Zoro's resemblance to Ushimaru, which most readers picked up way back in Act 2. The timeline of Kaido's assault on Ringo and Zoro's age line up. Ringo was said to have held out the longest of all the regions, but were overtaken. We know that the Shimotsuki occupy the only legal port in and out of Wano, so if Ushimaru wanted his infant son, who would've been 1 at the time of Wano's takeover, to escape safely, then there's already a plausible solution.
20 years later, Zoro's return to take back the home he never knew.