In an apparent error, Amazon.com’s DVD placeholder page for Song of the South listed the movie as slated for release on July 15, 2012, with the option to pre-order. However, this release was not official (the page showed the distributor as “Klassic Movies”, not Disney), and was quickly pulled today.
Interestingly, as of this article’s writing the page still shows buying options from other sellers, despite being unofficial (bootleg) copies. It will be interesting to see how long they remain up. You can view the other sellers here. Thanks to Joe and Cheryl for the news reports!