Crazy idea...
But could this have been a deliberate social media "plant" by Disney? Something they knew wasn't true but yet something that sounded plausible and likely to be of interest to many, just so they could gauge the reaction, interest, speed and direction of propagation throughout the twitverse.
It's not out of the realm of possibilities, after all there have been legit surveys about what the public would like to see in a SW land. This is sort of an online survey of sorts, to see how interested people would be in an announcement by Iger, presumably about SW. And we also suspect that "plans" for attractions have been deliberately leaked both here and elsewhere to gauge actual fan interest in the project.
Plus it is a dry run should they ever contemplate ACTUALLY announcing a *real* press event in this manner. They know when and how it would be trending in twitter, what collation sites would pick up on it, and who the initial responders would be and how they are regarded by the WDW online community in general.
Even if nothing ever comes of this, they could have mined a wealth of social media data by monitoring the response Saturday night.
I know, probably just a social media hoax by someone looking to drive up traffic to their site. But I think this could be possible.