I can imagine Jeremy Irons as the Riddler, sending Batman a DVD.
"Good day, Batman.
My name is the Riddler. Before we begin, I would like to point that that I am not your run-of-the-mill criminal. I do not behave like one, and would appreciate your not treating me as such. That Joker fellow was a debased, primitive criminal. What you did to him was only fair play.
Allow me to make this point abundantly clear: I am more intelligent than you are. You cannot outsmart me, and any attempt to do so will be met with...dire repercussions. Simply follow my instructions to the letter, and your precious Gotham City will be spared..."