According to the list of special features included with upcoming animated feature Batman and Harley Quinn, the next DC Animation direct-to-video release will be Batman: Gotham by Gaslight, an adaptation of the first ever DC Comics Elseworlds story.
Batman Gotham by Gaslight 1080p WEB-DL DD5.1 H.264-Bibiloni9
http://www.imdb.com/title/tt6556890/
[Video Bitrate]:.............: 5328kb/s [Duration]:.............: 1 h 17 min [Video Codec]:.............: AVC [Resolution]:.............: 1920x1080 px [Aspect Ratio]:.............: 16:9 [Audio Codec]:.............: AC-3 [Audio Bitrate]:.............: 384kb/s [Audio Channels]:.............: 5.1ch [Audio Language]:.............: English