The Sun is saying that the tracks range from unused songs recorded during studio sessions for some of MJ's classic albums like Thriller and Bad, to recent collaborations with new acts including Will.I.Am and Akon:
Tommy Mottola, former boss of Sony Music - who owned distribution rights to Jacko's music until 2003 - said: "There are dozens of songs that did not end up on any of his albums. People will be hearing a lot of that material for the first time ever. There's just some genius and brilliance in there."
Mottola also predicted that the unreleased tracks will help Jackson’s music outsell, and outlive, Elvis Presley.
Some serious money is about to be made.
Sources: Evan Agostin/Getty Images