I agree, Steve's site is the best source of information about military discounts.
I was anxiously awaiting the announcement for 2016, because we were considering a trip in mid-January. But then my DH mentioned he'd actually like to go early December, so we booked under the current discounts.
It's a great deal, and most likely will continue to be. For three adults in a deluxe resort for 5 nights, we saved almost $1000 (tickets and room) over the current discount offered to the general public.