The official website of the upcoming television anime D.Gray-man renewed its material, revealing that the premiere is scheduled for next July. The series will be titled D.Gray-man HALLOW and will run on TV Tokyo.

The new promotional video: 

Moreover, the rest of the cast revealed including:

Ayumu Murase (Shouyou Hinata from Haikyuu!!) as Allen Walker

Shinnosuke Tachibana (Tomoe from Kamisama Hajimemashita) as Howard Link

Takuya Satou (Toshiki Kai from Cardfight!! Vanguard) as Yu Kanda

Natsuki Hanae (Haruichi Kominato from Diamond no Ace) as Lavi

Ai Kakuma (Isuzu Sento from Amagi Brilliant Park) as Lenalee Lee

Yutaka Aoyama (Arthur Randall from Kuroshitsuji) as The Millennium Earl

Masakazu Nishida (Kyouma Katagiri from Gunslinger Stratos) as Tyki Mikk

Yui Kondou (Furano Yukihira from NouCome) as Road Kamelot

Soichiro Hoshi (Kei Kusanagi from Onegai Teacher) as Wisely and

Ryouta Asari (Toda from Chihayafuru) as Alma Karma

Also, the premiere, the title and the cast was officially announced in AnimeJapan 2016 and the author of D.Gray-man manga, Katsura Hoshino, commented that the upcoming series will continue the story from the first anime:

“Thanks to everyone who went to the D.Gray-man stage today. As was said in the announcement, a new series has been green-lit. Because the staff will be completely different, the story will be a continuation, but I think it will become a completely new D.Gray-man anime. Thank you for everyone who’s supported me until now.” 

The tagline of the new visual of D.Gray-man 2016 says "Don’ t stand still. Keep walking."

Sources: haruhichan.com, animenewsnetwork.com