If it's a Disney rumor, it should always be with a grain of salt. As most of us around here know, it could just as easily be cancelled or indefinitely delayed before it ever makes light of day. ie. Star Tours upgrade was rumored for more than 10 years by many, as well as numerous other projects that were rumored to be in planning, then officially announced, but never built. As one imagineer said, "good ideas at imagineering never die". Which means, if there is any legitimacy to a rumor, it may not actually see light of day, but parts of it might if they can find a way to make them happen or use them elsewhere. Which, I should add, Screamscape and others are reporting that DLP is planning a Star Wars mini-land, which if I remember correctly, was at one point rumored for DHS.
I think sometimes Screamscape and others, names not to be mentioned, are used as stooges to expose internal leaks, and then sometimes they're even used legitimately to leak something in hopes of it going viral.
Regardless, this isn't a rumor, it's an actual picture of something in the parks that hasn't been officially announced to the public. As I see it, they're just reporting what they, or in this case, what somebody sent them a picture of.