These were posted on some Asian site in January. They found them on someone's portofolio, apparently. Someone discovered them today and proceeded to troll /v/ claiming Doom 4 was canceled. Bethesda denied the game is cancelled.
You can find the images here.
Pro-tip: game isn't finished, pics aren't marketing shots. I suppose they're from one of the environment artists.
Some of them are extremely atmospheric and remind me of Metro 2033.
Hover the cursor over them and you'll get the original filename which might hint a thing or two (like the NY location lol). All are screenshots, although some look like concept art.