Btw, searching on the web I came across many old foreign forum threads reporting interviews with producers, managers and so on. One published on March 2007 I think is quite interesting:
"Raymone Bain, Michael Jackson's spokeswoman, has revealed the names of the producers working on the artist's new album. The three are Rodney Jerkins, a long-standing favourite of Jackson, Will.I.Am of the Black Eyed Peas (of the collaboration between the two, Rockol already reported on 9 October), and Neff-U. However, Bain, before releasing the names of the three producers, had stated: 'He hasn't decided if he's going to do a show in Vegas yet. He's been in the studio since November, intent on working on his music'.
What could he have been working on from November 2006 until March 2007? I wonder if at least one of the tracks has vocals in a fairly advanced state of completion.