Do we really need another michael jackson compilation?

I got an email the other day about a 2 disc cd coming out in october to coincide with the movie "this is it" the 1st disc is some of mj's hits in the order they appear on film then at the end of it there is 2 versions of a new song called "this is it", the second disc is unreleased versions of some more old songs then at the end michael reading a poem called planet earth, while I'm curious to hear the new stuff this has got to be like the 6th compilation cd he released, believe me I'm a big fan and have been since the 80s but do we need another compilation? do you think we will ever see a full album of unreleased songs?