Why do we need any of this?
Ok. Let's hypothesize what will happen if the people of Wano don't see Kaido's defeat/downfall/death/whatever.
Are they just going to randomly notice that Kaido disappeared and suddenly go back to being happy again? That's never been how Oda writes. There's always a moment of relief for the citizens as they witness their freedom being given back to them.
-The whole community saw Luffy destroy Arlong Park & KO Arlong.
-The Alabasta war stopped when it started downpouring following Crocodile's defeat (and he was blasted into the sky publicly)
-The Skypiea inhabitants were made aware of Enel's actions and everyone heard the final gong from Luffy smacking the bell
-All the SHs witnessed Luffy defeating Lucci in the nick of time
-All the shadow-less people in TB witnessed Luffy defeating Moria
-All the Fishmen witnessed Luffy defeating Hody
-The people of Dressrosa witnessed Luffy defeating Doffy
This time, the Wano citizens aren't even AWARE of what's going on. They're literally attending a festival.
And I don't see how or why we would not get an explanation on Toki's prophecy. As recently as the last chapter or two, we had a line of dialogue reminding us about Toki's prophecy. We even got clarification on the rooftop about Oden's whole spiel about new generation pirates, and that wasn't even difficult to decipher