Darksiders 2: Definitive Edition releases on PS4 and Xbox One on the 6th of October, according to Amazon. Although there has yet to be an official announcement by Nordic Games, it's worth mentioning that it was also through Amazon that the definitive edition was first revealed.
The remastered version of Darksiders 2 will feature higher visual quality in terms of lighting and shadows, improved and reworked level, character and environment graphics, and reworked and tuned game balancing and loot distribution. It will also include all the DLC released for the game, which adds approximately 30 hours of playtime.
In addition to the release date, Amazon also indicates that the game will be available for $29.99.