One Piece 15th Anniversary: Dive to Grand World

One Piece 15th Anniversary: Dive to Grand World is a minibook released in Weekly Shonen Jump alongside Chapter 676.

Chapter 1: Islands
This chapter explains how Punk Hazard changed since the battle between Akainu and Aokiji.

Chapter 2: Races
Chapter 2 includes all the known races of the world, including one race that has been spoken of but not yet seen (snakenecks). The three-eyed girl's races remain a mystery.

Chapter 3: Animals
The third chapter introduces estimated sizes (as well as other characteristics) of animals (and other characters).
 * Shirahoshi: 17m
 * Megalo: 25m
 * Hoe: 40m
 * Sea Bear: 50m
 * Sea Lion: 55m
 * Large dragon from Punk Hazard: 70m
 * Smiley: 150m
 * Kraken: 300m
 * Sea Kings: more than 5000m

Chapter 4: World Government
Chapter 4 presents the Shichibukai and the marine ranks of some characters. Dracule Mihawk, Donquixote Doflamingo, Bartholomew Kuma, and Boa Hancock are confirmed to still be part of the Shichibukai.

Chapter 5: Pirates
This chapter presents various pirates, the bounty posters from the "One Piece Ten" exhibition, and a bounty ranking:
 * 1) Portgas D. Ace: 550,000,000 (dead)
 * 2) Trafalgar Law: 440,000,000 (frozen)
 * 3) Jinbe: new unknown bounty after quitting Shichibukai
 * 4) Monkey D. Luffy: 400,000,000
 * 5) Donquixote Doflamingo: 340,000,000 (frozen)
 * 6) Pekoms: 330,000,000
 * 7) Gekko Moriah: 320,000,000 (no longer active for an unknown reason)
 * 8) Eustass Kid: 315,000,000
 * 9) Caesar Clown: 300,000,000
 * 10) Bartholomew Kuma: 296,000,000 (frozen)
 * 11) Basil Hawkins: 249,000,000
 * 12) Fisher Tiger: 230,000,000 (dead)
 * 13) X Drake: 222,000,000
 * 14) Caribou: 210,000,000
 * 15) Scratchmen Apoo: 198,000,000
 * 16) Coribou: 190,000,000
 * 17) Killer: 162,000,000
 * 18) Jewelry Bonney: 140,000,000
 * 19) Capone Bege: 138,000,000
 * 20) Roronoa Zoro: 120,000,000

Chapter 6: Mysteries
The final chapter lists mysteries such as the Will of the D., One Piece, the World Government taboo, and the three ancient weapons: Poseidon, Pluton, and Uranus.

Trivia

 * Yeti Cool Brothers' faces are revealed for the first time.