The release was annouced here.
Date is September the 18th and I have no idea why they list the S6 extras still. :/
Also for those in Europe I saw the anime with a July 20th release date this year in the german Amazon.de site, you can already pre order. Just thought to post in case anyone is interested.
And I got my e-mail from Amazon confirming the release date.
I'm really looking forward to re-watching season 7 after having to rely on inconsistent live-stream feeds.
Roll on September and then October for brand spankin' new episodes!