It is being reported (informed speculation) on sites that require membership (so I can't post link) that FD will not be offered in Oct, beginning of Nov, and not as close to Thanksgiving as it was last year, if Nov is included at all. The popularity of that time has increased dramatically and hasn't been considered a slow time for a couple of years.
Last year during the early WDW holidays, DHS was pretty much cut in half with no Osborne Lights. This year with Pandora, more crowds are expected. Plus with the construction at CBR and CS the number of rooms in inventory will be less.
Who knows? For those hoping for FD during this time, I will keep my fingers crossed, but wanted to mention in case people are absolutely counting on the discount.