So, here we are with a history of blurbs with little "official" news]
That's pretty much the problem. I mean, i'm not going to buy a game on the strength of a soundtrack, but it's a nice bonus if the soundtrack works, and is by an artist you like. The quake1 soundtrack was great IMO, not cos it was Reznor, but cos it was perfect for the game. That was mainly why I was looking forward to Reznor doing the soundtrack here - cos he nailed it (no pun intended).
That being said, Tweaker did a great job on the Alice soundtrack, and this is, as many have said, just the theme music.
At the end of the day,you can turn it off, or replace it (Nefilim's Zoon] was always a favourite for Quake)