It was originally scheduled for september 2 2016 but it was postponed for unknown reasons. Later Scheduled for April 4 2017, but changed to March 3 2017. March 1st announced another delay, with the new release date set for August 4th, 2017
Summer 2016 issue of Jump SQ Crown provided some samples of the fanbook:
Some other samples were given with Winter 2017 issue of Jump SQ Crown.
|Manga Omakes:||Character Profiles • Discussion Room • Komui's Discussion Room • Komui's Discussion Room Special Edition: Noah's Ark • D.Gray-man Investigation Series (?) • Weekly Jump Polls • Character Bedroom Sketches • The People of D.Gray House • Pointless D.Gray Stories|
|Anime Omakes:||D.Gray-Omake Mini Theatre|
|Fanbook Omakes:||Zone (Robin/Julia) • D.Gray-man Official Fan Book Gray Ark • D.Gray-man Illustrations Noche • CharaGray • D.Gray-man Official Fan Book Gray's Memory • D.Gray-man - Artbook - Gray Walker|