I'm still wondering whether it will be included for people who already bought the main game or preordered it. They suggested it would be previously, but everything points towards it being a paid DLC for everyone.
From what I understand everybody will have to buy it. Of course it’s nice to get things for free (especially if they previously stated it would be). But if it’s good DLC rich of content I don’t mind paying. It was the same for me with the two expansion sized DLCs in the Witcher 3.
Witcher 3 is exactly what I'm referring to - if you bought the PC version directly from CDPR on GOG, you got all future DLC and eventually the GOTY edition.
There were a couple mentions of it. Previously, purchasing directly from GOG would get you all future DLC, then later your purchase would be upgraded to GOTY edition. Eg with Witcher 3.