Apparently these "forbidden" images are from a recent Walt Disney World cast publication, announcing that Pandora - World of Avatar will be open to the public Summer of 2017. The graphic and design work here all looks very 70's / early 80's- much like EPCOT Center to me. (Together with the type of science fiction represented here, this also seems to be the "future fantasy" look that park's Future World will eventually embrace.)
Once guests arrive on Pandora, the Flight of Passage and the Na'vi River Journey will be the two headlining attractions while they are "on tour" with Alpha Centauri Expeditions. The real showpiece isn't found inside these but instead all around. Disney Imagineers have created a stunning environment as never before. Looks to be Cars Land on steroids- and with a price tag to match. The recent aerial images found on WDWMagic (as where the above pieces of promotional materials were also found) are jaw dropping. Hopefully, the attractions will be as stellar as the land they inhabit.
(Art copyright The Walt Disney Company.)