The latest one is called 'Arrival' and is an 11-level episode replacement pack created by 'Pavera' with music by 'AD_79' and assistance from various other talented individuals within the DOOM modding scene.
This mod is once again free and can be downloaded from either game's main menu. If you would like more details about what Arrival has to offer, you can read a full interview with the creator over on the official Bethesda website.
Will you be checking out this new add-on? Fire off a comment down below.