They are also reporting an August 27 release date for the Season 4 sets.
It does not appear that the sets are available to pre-order on Amazon.com as of yet; as soon as they are, we will update this post accordingly. In the meantime, you can find an early look at the packaging art below. You’ll notice that certain parts are missing, including the bits that say “The Complete Fourth Season” and, of course, the spine.
Here’s where you can pre-order it: