Next phase of the arc should be
-Drake beats Apoo
-Killer finds a way to beat Hawkins without killing Kid (or he just trusts Kid to fight on through the pain)
-Neko beats Perospero, Carrot should be involved
-Inu beats Jack
-Sanji beats Queen
-Zoro beats King
-Momonosuke gets turned big, takes Luffy to the roof, Momotaro of Momo/Luffy/Yamato/Marco. Momo stops Onigashima from falling
Final phase will be
-Kid and Law vs Big Mom, they might beat her but not in a fight. If not, she‘ll betray Kaido and go hunting for his Road Poneglyph when it seems he’s going to lose
-Kaido takes out Yamato and Marco and goes one vs one with Luffy
-Momo takes out Orochi, who’s maybe trying to kill Hiyori
-CP-0 provide something for the other characters to do while Luffy fights Kaido. Them or Big Mom.
-Luffy beats Kaido
-Kaido gets up awakened and ZKK
General stuff
-Kaido’s flashback will be shared with Yamato’s, will show him recruiting his crew (mostly King and Queen), Rocks will only be teased in it
-Zoro will go to Ryuma‘s grave and we’ll get a small flashback of his past where we find out how he’s related to Wano
-At least one massive lore drop from Oden’s journal and/or Kaido’s Road Poneglyph
-The Big Mom Pirates will not play an important role at all, they’re just there to give Big Mom a way off the island. Whether Big Mom is defeated by Kid and Law or not, she won’t be a threat after this arc.
-Act Three might end after Kaido is defeated, but it’s entirely possible that it is the sole remaining act and Oda doesn’t want to reveal what has happened in the rest of the world until after the arc.