Damien has said multiple times “What You Do To Me” is complete enough for release, and it was considered for Bad 25- he also posted some of the lyrics he heard on his Twitter. “Weight” has been confirmed to have full vocals by multiple sources. Also, ”The Choice”, “Homeless Bound”, “Garbage”, “Janet/MJ Duet” are instrumentals with no vocals (technically, Homeless has audio clips in it but not from MJ). As far as I’m aware- didn’t Michael say in an interview that he recorded Buffalo Bill right after Billie Jean was finished?