This blog post is most likely only going off of speculation/rumor, but it sayd August 7th for booking and that it's likely they will only be a Fantasmic option. No!!! That is NOT what I want!!
http://mealtrip.com/hollywood-studios/its-official-minnies-holiday-dine-at-hollywood-vine.asp
http://mealtrip.com/hollywood-studios/its-official-minnies-holiday-dine-at-hollywood-vine.asp