Well, supposedly they'll be showing parts of both projects off at D23 according to that article. Hopefully it's actually something of substance.
As skeptical as I always am on Disney projects, i'm pretty confident on this DHS refurb and Avatar. People are criticizing Avatar because of how long it's taking, but in reality, this is a rushed project considering there was nothing started on the R&D side when it was announced. Projects almost never are under the pressure Avatar is because of that announcement. But if they get it open around 2017 or so, that's 6 years from R&D to open. It usually takes much longer with Disney.