They've stated it implicitly by only building two E-tickets in 10 years across four parks, and only four or five D tickets... no response whatsoever to two Harry Potter lands... I don't care what they say they're building for 2020, or what will open in several years time - Diagon Alley is open *now*, today. If I visit the Disney parks today, and look to see what's new, and what's closed, it feels like they're in the business of reducing attractions instead of increasing them.
Will things change in a few years? I hope so. But I'm comparing what I can experience today, and from the way I see it, WDW isn't a good option for the next few years for anyone primarily interested in new attractions.