Some castmembers are just now being told they would be on the opening team. Next will be advertising and hiring others to work on the attraction, at which point it's likly a four or five month process based on the last three or four attraction that have been opened. Could be less, as they have been testing the ride portion of the attraction of nearly eight months. We just don't know if the inside construction is at the same point as the outside... or if it's much further along or even finished.
They said SPRING, so March 20 - June 21... likly they will do several weeks of previews for the CM, the media,
D23, DVC and AP Holders. So should know at least two months before the official opening...
Maybe Easter, or Memorial Day....