It will surely sound like shit. Although the teaser they put out was quite promising. However, they did the same prior to their last album's release, and we all know how it resolved.
It's Venom, if you're a die hard fan you'll probably love every second of it because to me it sounds like everything else they have released in the last 15-20 years. It's not terrible, but I doubt it's going to win any new fans over.