Interesting discussion, thanks guys!
Years ago, I helped Joe Vogel fact-check some of his articles. I just read through some of our old correspondence.
In 2011, he told me:
About Michael's final songs:
Think of it this way: if we are comparing to the Dangerous album, it was still 1990. So think of all that happened in terms of the evolution of Dangerous from 1990 to fall of 91. I Was the Loser could have been a "Serious Effect" or "If You Don't Love Me." MJ rarely made it clear to people what was going to make it or be a single until very late in the process. That being said, it was a song he re-recorded at the Bel-Air hotel in 2008, so he clearly liked it.
About Rodney Jerkins sessions:
I don't know a lot as I haven't heard them. Brad Buxer and John Branca have heard them and told me about some of them. They both told me I was overstating when in an early draft I estimated there were about a dozen unreleased Darkchild tracks. They said it was probably about half of that that are releasable.
About John McClain:
Very little interaction with McClain. Almost all with Jim, Karen, Howard and John. I'd like to talk to him more though as he primarily oversees the music.
About Slave to the Rhythm (at the time, still unreleased. Remix leaked with no context):
John Branca told me the track originated with LA Reid and Babyface, and was later handed over to Jam and Lewis. It could be one of those songs that was kind of passed along to different collaborators during different album sessions (ala They Don't Care About Us, Earth Song, etc) It seems like it was written or co-written by MJ to me as well.
Thought it might be worth sharing here!