Update: According to players, the update is 35GB on PC and 58GB on Xbox One.
Original Story: Bethesda has announced that Doom update 6.66 is rolling out today on PlayStation 4, Xbox One, and PC at 11am PT/2pm ET, and it will make all of the multiplayer DLC free to all players.
On their website, Bethesda explained that the Doom Season Pass has been retired and all three DLC packs (Unto the Evil, Hell Followed, and Bloodfall) are now free:
First, we?ve retired the DOOM season pass and are making all of the multiplayer DLC content available to all players. That?s three multiplayer DLC packs, which include nine of our best maps, three additional guns, three additional playable demons, new equipment, armor sets and more. That?s on top of the modes and features, like bot support, that players have been enjoying since late last year. Also with update 6.66, you’ll find a new rune system, a revised progression system, and enhanced kill notifications:

Revised Progression System – The revised progression system will alter when and how players unlock additional guns, demons, equipment, and all of the player and weapon customization options. Instead of relying on the random distribution of unlocks, items now unlock through specific leveling requirements or through in-game challenges that the player can complete. For example, if there?s a specific helmet you want right now, you can work towards unlocking it by focusing your play style on the requirement.
New Rune S...