Well it's not a release date, but the achievements for the upcoming 20 hour expansion for The Witcher 3: Wild Hunt have been posted to the game's official Steam page. While not it's not completely out of the norm for achievements to leak, it is odd that they have been revealed ahead of the official release date announcement, which CD Projekt Red has said will be sometime before E3 2016.
Last chance. *POSSIBLE SPOILERS*….now it's your fault.
Here's a picture of the Achievement list taken directly from Steam.
There isn't a whole lot to go on, plot wise from these achievements. But it's more-so in terms of what kind of new gameplay opportunities we might have with the Knight's Tournament.