Even if ZKK memes didn't exist, Oda giving Zoro time against Kaido alongside the other 4, with Zoro being able to defend Luffy several times, tank hits from both Big Mom and Kaido, blocking Hakai for a few seconds and then scaring Kaido permanently. I would say him going back down to fight King wouldn't hype me that much at all.
If that's what only happens, great, Zoro did a lot in this fucking arc. But whenever people remember about Zoro in this raid in the future, at least most of Zoro fans, they are gonna remember the big moments of the rooftop before the King fight.
And there's also all that build up of giving Zoro Enma that was the only blade able to scar Kaido, and how Zoro could surpass Oden if he was able to turn it into a Black Blade, all that stuff is thrown in the garbage if he just fights King. There's also all the Ryuma in Monsters, Shimotsuki Lineage, Thriller Bark Ryuma Moment setups that would just go to waste.