I have never heard of Darkness before. I think this all a publicity stunt by Hawkins. Bono recorded the line, which seems to have been unsatisfactory and then others tried to rerecord it including Hawkins. I think hawkins wanted it out that he outsung Bono and was upset when Bono was called in to redo his 2004 version. This new version has very little star power. If bono agreed to lend his name, I don't see how anyone would have removed him from the recording no matter how bad he sounds.