CNN: And what was it like voicing the Joker in the "Dark Knight Returns" DVD movie?

Emerson: If I knew how significant it was to play that role in that franchise, I think I would have been terrified when I took it. I must have been busy or distracted, because I went in there carefree. I had not seen these recent big screen "Batmans." That's probably a blessing. Later when I saw Heath Ledger, I thought "Oh, God. If I'd have seen this, I might not have done it." As it was, my only role model was Cesar Romero, and I thought, surely I can do as well as Cesar Romero.

CNN: Did you get to laugh?

Emerson: I did. It was a chance not to be repressed or contained. All the shows I do, it's all about keeping a lid on it or staying small. When you play the Joker, the sky's the limit. You can turn that thing up to 11.

I know it's a franchise where people have very high expectations and loyalties to whomever has played before, so I hope they'll accept me.