Some fans say they shouldn't release songs that have been leaked onto the net...I disagree. There's a world full of people who haven't heard these songs, and most of these songs are awesome. Blue Gangsta and Slave To The Rhythm IMO could be big club banging hits. These types of songs make you want to get off your ass and dance...especially Slave.
Xscape is another good song that could do well. These songs would have fit on the Michael album really well IMO...and with only 10 tracks on the album, it boggles the mind why they left so many good songs off the album with so much space available on cd. Cds usually can go up to 80 minutes max...Michael was only about 45 minutes worth of songs.
Hopefully any future albums with unreleased material have more to offer then the Michael album...and of course no controversies with vocals, etc.