Gotta say this chapter was pretty cool. The flashback with Yamato and Ace gives the former even higher chances to be the final crewmate of the Straw Hats, even though I prefer Carrot personally.
And yeah, Whitebeard, I get his reasoning all too clear. Oden died a good time ago, so there is no real point to go and wage a war of revenge against Kaido. And of course, Ace is too "hot-headed" and had to be smacked down a bit by Pops.
Biggest surprise though, was Kaido's DF. A unknown Mythical type Fish Fish Fruit, and the first of its kind to be revealed. At first, seeing as Kaido can turn into a dragon, one would think the Fish class wouldn't fit a dragon, but seeing this is a eastern dragon, and eastern dragons have fish scales and are more associated with water, like how fishes are, it makes perfect sense. Even more so because its said that Chinese Dragons are seen as the head of the Fish clan, and rule over all aquatic creatures.
Makes me wonder what the fruit's full name could be. I got some options below:
1. Uo Uo no Mi - Model: Dragon
2. Uo Uo no Mi - Model: Long (Long is another name for Chinese Dragons to make them distinct)
3. Uo Uo no Mi - Model: Seiryu/Azure Dragon
4. Uo Uo no Mi - Model: Ryujin
5. Uo Uo no Mi - Model: Mizuchi
Also, seeing as this fruit is very likely based or inspired by the myth of a carp climbing a waterfall and ascending into a dragon once it reaches the top, I could imagine that once the fruit gets eaten, despite being a mythical dragon model, the user actually turns into a carp or koi at first and needs to train to unlock its true form of a chinese dragon before the user fully gains the ability to go straight to dragon, fully referencing the chinese myth.
Or, simply said, the user just gets the power to turn into a dragon without special requirements. I could also imagine this fruit to be the only type that allows the user swim by some degree. It could work in the following that the user could maybe only swim when going into their full Zoan or Hybrid Zoan form before diving into the water.