Board Thread:News and Announcements/@comment-6697950-20170629161158

According to the official site and various stores, the Ordinal Scale Blu-Ray release (JP) is slated for September 27, 2017.

The Limited Edition version will come with:
 * A short story by Kawahara Reki (illustrated by abec)
 * Character designs
 * Bonus booklet (108 pages)
 * Sword Art Offline: Ordinal Scale special
 * Ordinal Scale commentary
 * Yuna's songs (movie version)

More detailed version can be found here.

Stores:
 * Amazon JP
 * AmiAmi
 * Gamers
 * Animate

A list of exclusive store bonuses can be found here 