Impossible to know with any certainty, especially after what happened last fall with discounts. The best thing you can do is not get tied down to any particular dates. Last year they took forever to release any discount, and when they did, there were lots of blackout dates. If that happens again, you don't want to be stuck with only a certain week because of work or flights. Keep your eye out for mailings and emails from Disney Destinations, because lately they are the next best discount you can get to free dining.