Chapter 860 [Spoilers]

Katakuri's bounty is 1 billion 57 million.

According to Bege, Katakuri's CoO is so great that he can see through the future which will happen before it happens. He kills a underworld guy who would've "attempted" to kill Big Mom.

Ch. 860 10:00 Opening of the Reception

Pekoms has been left by himself at the eastern bay entrance.
Aladine and the others have left the island according to Jinbe's instructions.

Flashback
Jinbe gives a detailed explanation of the roulette
The numbers written on the roulette collectively represent the number of victims fallen to the punishments.
Jinbe, who wasn't going to suffer that ridiculous punishment, gave instructions for them to make a break for it from the island in the confusion of the incident at the tea party.
End Flashback

The Vinsmokes are walking through the castle, and the ceremony location appears to be a rooftop.
The guests to the tea party arrive one after another.

Loan Shark King "The God of Fortune" Le Feld
Red Light District Queen Stussy
The Great Mortician Drug Pietro
The World Economic Journal President "Big News" Morgan

They all arrive to the rooftop by a candy escalator made by Perospero