I assume they will release it at some point. They've released the soundtracks for Morrowind, Summerset, Elsweyr, and Greymoor all as their own separate albums, so I'd imagine they'll continue the trend. It just might be a few weeks (hopefully not months). I haven't actually played Blackwood yet, but I went afk for a while and came back to the login screen to hear a beautiful track I'd never heard before. Immediately looked it up on YT. That, and the main theme is fantastic. I'm excited to listen to the soundtrack, and I think from what I've heard it might be my favorite since Summerset.

I think it was around August or early September that they released the Greymoor soundtrack last year. They'll probably stick with a similar time-frame.