Scheduled to air on 26th August at 9.00pm, the One Piece Episode of East Blue: Luffy and His Four Crewmates’ Big Adventure (Luffy to 4-nin no Nakama no Daibouken) is a completely new work and will feature reanimated scenes from the beginning of the series through the point when the crew enters the Grand Line. Commemorating the manga’s 20th anniversary, this two-hour special will feature anime versions of the original manga’s chapter cover stories as part of the ending credits. Not only that, the original opening theme song “We Are!” will also be featured.
Just a few days ago, the official website (https://one-piece.com/news/detail/20170626_5625) of the franchise revealed several screenshots as well as a visual, featuring Luffy, Nami, Zoro, Usopp and Sanji as shown below.