I'm Sorry
(Batman is bringing Joker out of the Monarch theater.)
"I never meant for this to happen, Joker. And yet somehow, I knew it would. Funny..."
(Batman sees Harley's face as he walks past. The inmates are at a loss for words.)
"Harley will probably go mad without you. Especially when she's bearing YOUR child. That's right. I saw the test... I can only wonder what THAT will bring..."
(Batman waits for the doors to open before walking out of Arkham City.)
"Maybe Strange was right... Maybe this is all my fault... Had I not been there the night you were robbing ACE chemicals... There would be no Joker. Barbara wouldn't be in a wheel chair, Jason would have never been killed... Hell, there would probably be no Batman. Not now, at least..."
(Batman places Joker on the police car.)
"Though you don't believe me... I'm sorry. Truly... Rest in peace, my greatest enemy..."