One Piece: Pirate Warriors 4 launched March 26, 2020 in Japan, March 27 in the west

One Piece: Pirate Warriors 4 will launch for Sony PlayStation 4, Xbox One and Nintendo Switch on March 26, 2020 in Japan for 7,800 yen and for PlayStation 4, Xbox One, Switch and PC via Steam on 27th March 2020 in the Americas, Europe and Southeast Asia. In Japan, the Xbox One version will be released in digital format only.

(Note: Although the release date for the Americas and Europe has not been officially announced, according to Bandai Namco. The official announcement will be made on the morning of November 25).

Below is an overview of game bonuses and special editions (Southeast Asian versions):

Retail Day-One and Digital Early Purchase Bonus
Nami Additional Costume: Onami
Zoro Additional Costume: Zorojuro
Sanji Additional Costume: Soba Mask
And another 2 outfits.

Digital Deluxe Edition Bonus

Early Unlock: Vinsmoke Niji
Early Unlock: Vinsmoke Ichiji
Early Unlock: Vinsmoke Yonji
Season Pass Bonuses:
Early Unlock: Charlotte Katakuri
PlayStation 4 Version: One Pice: Pirat Warriors 4 PlayStation 4 theme

Collector’s Edition
A copy of game
Collector’s box
30-centimeter LED diorama

Bandai Namco also announced the differences between each version of the game:

Differences between versions

Number of players on Switch Console

And here is an official overview of the game, via the website:

One Piece: Pirate Warriors
One Piece: Pirate Warriors is a very popular series that has sold more than four million copies. One Piece: Pirate Warriors is a game created by a collaboration between Bandai Namco Entertainment and Koei Tecmo Games! Based on the idea of a great adventure, it's a famous series where you can experience the fascinating adventure of One Piece, depicted in anime style!

One Piece: Pirate Warriors 4
Improvement action One Piece Musou! With the theme of "One Piece's real fighting experience", the game offers a great experience like destroying buildings while in action, dust clouds enveloping the air and more. By combining new elements never seen in previous One Piece: Pirate Warriors games, the game brings One Piece Musou action even more interesting!
Destructive Action – Destroy the battlefield and fight the enemies!
Aerial Musou Action – From the ground to the middle of the air, from the middle of the air to the ground, a new interconnected flow shows the dynamic feeling of One Piece! New actions and combos have been added to the characters in previous titles.

Story
Relive popular episodes from the television series by accessing One Piece's "Dramatic Log" mode: Pirate Warriors.

Characters
Over 40 selectable characters - the largest number of characters in the history of the One Piece: Pirate Warriors series. Players can choose characters from the previous series, including those in the "Dress Dressa Arc" and "Whole Cake Island Arc", to join One Piece: Pirate Warriors 4! Moreover, some characters can drastically change their appearance through "Form Change", allowing players to enjoy the unique experience of One Piece: Pirate Warriors at a whole new level! (Some characters, including selectable characters, from past titles will not be available in One Piece: Pirate Warriors 4.)
The confirmed characters include:
Monkey D. Luffy
Rorona Zoro
Usopp
Sanji
Nami
Tony Tony Chopper
Nico Robin
Franky
Brook
Boa Hancock
Jinbe
Trafalgar Law
Bartolomeo
Cavendish
Charlotte Katakuri
Basil Hawkins
Carrot
Vinsmoke Reiju
Vinsmoke
Vinsmoke Niji
Vinsmoke Yonji
Confirmed bosses include:
Charlotte Linlin (Big Mom)