Looking to find how many days of theme park passes were required for the 2016 package, I searched Google using the terms "disney world 2016 free dining theme park passes", but what was interesting was the second item that came up in the search result:
When I clicked on the link it came up "Special Offer Not Available", but the Google description of the page, which must have come from Disney, reads "Explore a room and ticket package offer that includes a dining plan at select Disney Resort hotels, most nights from August 21 through December 23,
2017" [emphasis on 2017 added]. If Google has linked to a placeholder page that Disney will make live next week with the offer, then the rumored December 23 end date for the offer appears correct though the start date of August 21 on the page listed by Google is later than the current rumor (though maybe Disney Visa holders and certain other groups or nationalities may get the Aug 13 start date, based on the rumored start date).
I don't know exactly what I found means in terms of what the final offer will be, but it is an interesting piece of info for those of us waiting for the release of a possible free dining package.