Doom was revealed to counter fears of trouble at id Software, public reveal unlikely this year
Honestly, I can't blame them. They needed at least the positive impressions and word of mouth at this point, because it was becoming very hard to have any faith in the project with all the rumors of Id basically being on fire. I'm okay with waiting, as long as this doesn't become a Duke Nukem situation. I don't want to become that dude who saved his DNF preorder for like a decade.
Though I am well on my way to becoming that.