The Vault
This is not a new Prince album (it would be an Artist album, if it was). This is a collection of tracks that the Artist submitted for other albums while he was under contract to WB, and they decided to make some more cash off of him by releasing these tracks without his permission.
There may well be more albums like this emanating from WB over the next few years. That being said, this is a collection of songs that don't really go together, but if you look at it as more of a compilation album or some such you can get past that. These certainly are not filler tracks that just never made albums, they were probably not used by WB because they are not "typical" Prince tracks. They are all fairly jazzy and light (think Lovesexy/SOTT with a little Around the World In A Day mixed in).
Standouts are The Rest of My Life, 5 Women, When the Lights Go Down, My Little Pill, and Old Friends For Sale (though I like the version from the Crucial version a little better).