I don't think anyone official has posted anything about this. They want to make sure that they can keep any promises they make, and don't want to promise a specific date when they're not sure.
My best guess is videos middle September and DVD's mid-October (there was about a month difference between videos and DVD's last time around...but they are doing a few extra things to the DVD's this time, like the "no music" option, which will take some more time).