I still don’t think Orochi is dead. The shot of the head (still on fire) makes me think it’s another fakeout. Kaidou’s defeat is happening right in front of the people of Wano. It’s even more necessary that Orochi’s defeat be witnessed in that way.
Kaidou’s flashback was interesting, but not enough. His motives are still a little murky. One of the more tantalizing bits was the implication that something happened at God Valley that was so important that the Rocks Pirates felt they needed to rush to it. So they weren’t the ones that started it.
I wonder what Kaidou thought when Luffy said he wanted to create a world where his friends could eat their fill. This is especially intriguing after the reveal that Kaidou let himself be captured when he was hungry.
Also, Oda is making King more bishounen with every panel