Bryan Loren actually stated that he re-wrote the ‘Black Or White’ rap section that Bill Bottrell had already written.
Bryan Loren was very insightful about that rap section issue, and he also suggested that behind-the-scenes machinations and politics were to blame for the released version of the song that does not have his vocals on the rap section.
Bryan Loren is not egomaniac, but he simply shows some bitterness which is understandable since Michael Jackson did not use his songs on the ‘Dangerous’ album.
And if you read Bill Bottrell’s explanation (about that rap section) you will find some odd things that he said about Bryan Loren, such as that Bryan Loren was not comfortable being a rapper.
In fact, Bryan Loren was very comfortable being a rapper because he is a black artist who came from New York, the place where the rap genre was born.
And for ‘Men in Black’, there is indeed a finished cut in existence (author Adrian Grant heard the song at one point and he praised it).