The word is on the discount codes and rates board that the free dining will remain intact as far as the mid-August to late September offer, because it does work in Disney's favor. It is considered the height of hurricane season for them.
However, the word now is that the new free dining offer will not be the stay/play/dine plan. This is where adult's pay children's prices for the dining plan; it will be QS plan and only offered at the mods and deluxes. You would have to pay the difference to upgrade to the
DDP plan. A few posters on that board have gotten some fairly reliable information that is the trend.