Earlier this Summer, CD Projekt Red confirmed that they were hard at work on a Game of a Year Edition. At the time, the developers did not confirm when the game would release or the details on it. It looks like they didn't have to, an Amazon listing did that for them.
A 'Complete Edition' for The Witcher 3: Wild Hunt has been listed on Amazon (via NeoGaf) for $49.99. The game has been detailed to include all of the additional content for the game, which means that purchasing the game will give you 16 pieces of DLC and two expansions: Hearts of Stone and Blood and Wine.
The Amazon listing calls for an August 30th release, which is about four days later than what was believed to be the release date.