Hmm, I wonder, when Riddler said 'let that not be Joker behind my back', how could he not tell who it was speaking. I know I am being biased here but I am sure Joker doesn't have a low sexy feminine voice a la Ivy and I am sure Ivy doesn't have a falsetto. I dunno, I was just wonderin....
All in all, good stuff. I am even more excited for GCS.