There was a 70's rock song (sung by?) called "I wonder if the Joker dies (what will be become of me?)' . An interesting hypothetical long before Killing Joke and dark Knight returns!
Run DMC - I'm not going out like that : heard this when I first read Dark Knight Returns. I've always associated one with the other..
Bill Hicks - Chicks dig jerks : Reminds of Harley, especially the first verse -
"Ooohhh Hitler had his Eva Braun, Manson had his Squeaky Fromme, Ted Bundy went out on lotsa dates I wonder what ah'm doin' wrong"
also Liar by Rollins Band reminds me of Mad Love...
I made a post about this on the DC boards in the early 2000's . Someone said the "Arms wide open" song reminded him of Bruce and Dick :
"If I have just one wish, If I had just one plan. I hope he's not like me, I hope he understands..."
and your batman songs?