Quote Originally Posted by Here we go again...
Has anyone heard if there is a definite date? We will be there mid May.
There is a black-out period (for Disney's Animal Kingdom only) with a new Florida discount from May 27th through June 9th, 2017; so it is being strongly expected that this will be the opening week for Pandora.

There could be some chance of previews ahead of May 27th, but the closer to that date the better the chances.