Originally Posted by
sonic_discord
That's my guess as well. XX would be the roman numeral for 20 and it's been 20 years since the first S&M, so maybe it has something to do with celebrating the anniversary of the first one, as well? Someone on Facebook mentioned the possibility of it being a Black Album deluxe box set in the vein of the Kill 'Em All, Ride the Lightning, Master of Puppets, and ...And Justice for All. The Black background and grey text seem to support this theory (not to mention it's the next album in line in the discography for the deluxe reissue treatment), but I don't know what "XX" has to do with the black album, as that was released in 1991 (28 years ago).