The latest chapter of XXXHOLiC Rei announced that the first volume of the series will have a limited edition that will come with the original animation of "XXXHOLiC Shunmuki" in Blu-ray format. The animation was originally released in 2009 in DVD (OAD).
Image source:
clampProject.
XXXHOLiC Rei #1 will be released on October 23rd. You can watch the trailer of the first part of "XXXHOLiC Shunmuki"
here.
More details as they come! I hope CLAMP gets to draw a new cover art =)
Update: Kodansha's
XXXHOLiC portal site has more information about the release.
Apart from the remastered version of "XXXHOLiC Shunmuki", the Blu-ray will also come with the the first episode of the XXXHOLiC TV Drama. A special postcard will be included as well. This limited edition will go on sale for 5,250 yens.