Internet enabled CD's have been are commonplace now, but this promises to be something special. Probably.
"All will become clearer at time of release", apparently, but in the meantime my guess is there will be some BACKWARD MASKING. That's where you have to turn the record backwards to be able to hear a message, possibly from the devil.
One thing we do know is that it will lead to a website, where you can download exlusive tracks.
Read more about backward masking here on Yahoo...