Did you notice what Haffner was whistling on his way out from Lisbon's hospital room? I could have sworn it was "little cabin in the woods" which is a children's song that depicts a little rabbit who is being watched through a window by an old man. The old man is watching the rabbit who is "as frightened as can be". This fits with the whole red John personality. He is after all the hunter, watching the frightened rabbit. In the song, the rabbit is looking for help from the man not realizing that logically, he probably is the hunter. Also, he says to Lisbon, "we will have our time" which makes me think that he will leave Lisbon for last to kill-so he can take his time.