The names say nothing about how the song might sound like or what band it's from. Angels Don't Kill might just be another emo band for all a random person might know, but we all know it's an awesome and atmospheric song.
Try and keep wild accusations out of here. I'm pretty sure anything said about these two songs so far is so far off, that you'll laugh your faces off when the album is released and read 'em again.
As for the black metal and satanic stuff... Well, I'm interested to see what they can do in the vocal apartment. Hearing Alexi scream like on the first three albums would be cool, but is impossible. Also black metal is mostly just fast playing, but otherwise simple. It's not what I'd expect from CoB though, but we already know it sounds cool from CoBtv3