As the search for Red John is coming to an end, I wonder what will happen when Red John is finally caught. The serie will and must take another twist. Maybe it's a long shot but I can't be blamed for not  trying.
Is it in the name Red John?
John the Baptist in the Bible is the forerunner/precursor of something greater: Jesus (in Red John's case of evil). John prepared the way for Jesus.
Is Red John preparing the way for a greater evil that will be bestowed on the world?

If you look into the names of Ray Haffner and Roy Tagliaferro. The meaning of Ray/Roy has something to do with red and king/counsel. Red John is clearly a narcissist and every narcissist feels he is king of the world. Ray Haffner is showing all the traits of the perfect narcissist. A troubled past. A smooth operator. And under all that grey hair Ray Haffner (Reed Diamond) is originally a ginger. 
Haffner means maker of pottery Tagliaferro means iron cutter in italian. Both are craft guilds. 
Has this something to do with freemasonry?!
John the Baptist and the Evangelist are very important within freemasonry. A long shot.
Freemasonry, Visualize, secret societies, conspiracies 
With greater conspiracies, greater fun
We'll have to wait and see
Have fun finding clues