One thing, in particular, highlighted in the first round of previews - is the fact this game is a "strictly campaign" affair. In other words - don't expect multiplayer to feature. Here's exactly what Marty Stratton had to say about this ( via Eurogamer ):

Rise of Hydra will likely be two very different games, but Doom could set the stage for one Marvel 1943 mechanic.

Dark Ages also features a bunch of difficulty sliders that will let you change how fast and hard the game is, making it easy for everyone to hop in and kill demons. Doom: The Dark Ages arrives on Xbox, PlayStation, PC, and Game Pass on May 15.