Okay - who's Last Year's Man? Cohen past self?
Here's a quote from the author of Last Year's Man. Make of it what you will.
“I think that, from a certain point of view, my songs are free from meaning and significance. There's not a secret that is being concealed, there's nothing that I am not yielding. It really doesn't have a meaning any more than a diamond has a meaning. The meaning is that it was cut and polished and it produces light.” -- Details for Men, January, 1993
In other words, it's just a song. I thought the tie in with Joan of Arc was perfect.