SOme slight details:
http://www.blu-ray.com/news/?id=11912
"Walt Disney Home Entertainment has detailed the highly anticipated 50th Anniversary Edition Blu-ray release of Mary Poppins, which features an all new digital restoration, 7.1 lossless audio, and several new extras. The 50th Anniversary Edition combo pack arrives on December 10th.
Official Synopsis: Releasing from the Disney Vault, creative visionary Walt Disney's classic shines for the first time on Blu-ray. Starring Dick Van Dyke and Julie Andrews in her Academy-Award winning role, and featuring iconic toe-tapping songs including "A Spoonful of Sugar" and "Supercalifragilisticexpialidocious," Mary Poppins is a movie experience your family will enjoy again and again. An all-new digital restoration adds even more magic, helping bring the award-winning songs and amazing picture to life like never before. Share the music, share the magic, share the joy of Mary Poppins this holiday.
The Blu-ray release of Mary Poppins: 50th Anniversary Edition is presented in 1080p with DTS-HD Master Audio 7.1 surround, and includes the following special features:
•Mary-OKE's: This new piece highlights popular music from the film, specifically "Spoon Full of Sugar," "Supercalifragilisticexpialidocious," Step In Time," "Chim Chim Cher-ee" and allows viewer to sing-along to animated words that display onscreen in unique ways.
•Becoming Mr. Sherman (TBC by Theatrical Team): Join actor Jason Schwartzman as he sits down for a fun and musical-filled afternoon with Richard Sherman. In the new film, Saving Mr. Banks, Schwartzman portrays half of the famous composing team, the Sherman Brothers, who wrote all the classic songs from Mary Poppins, as well as many other favorites. Hear heartwarming, revealing stories about the making of this beloved musical, get more insight on working with Walt Disney, and get a unique sneak peek into Saving Mr. Banks, starring Tom Hanks, and Emma Thompson.
•Additional Extras: More content to be announced at a later date."