It was supposed to be March originally. They then delayed it to May, then June. Nobody knows (chances are, not even Roadrunner themselves) when it will really be released.
Welcome to the forums, by the way.
This entire album release was a huge disaster. Vinyl release delayed by two months. Box set delayed by half a year. And as far as I saw (without a detailed analysis), the HDTracks version is pretty much identical to the CD (but much worse than the vinyl records). Excellent work, Roadrunner...