Amazon has listed a Definitive Edition of Metal Gear Solid V. The post has been removed and did not include any description about the product, just a release date: December 31. Just a placeholder to be modified when the official release date will be make official.
Metal Gear Solid: V Definitive Ex could include The Phantom Pain and Ground Zeroes in one packet. Another possibility is a pack of The Phantom + DLC’s for Metal Gear Online or even an integral edition of The Phantom Pain + Ground Zeroes + DLC.
Some users are playing with another possibility: Definitive Ex could include the third chapter of The Phantom Pain. Frankly, I highly doubt about that.