After seeing the last episode, it's interesting to mention the kind of personality that has red john, i mean he is the most powerful man into the tigger tigger organization and therefore a confident one: into the logic of the three dots, i agree with those who said that that is only for the members and not for the lider, and most important of all the idea of knowing that he wouldn't be in danger if he comes, and the only person who doesn't arrive with a gun was Bret Stiles.  Nevertheless, I believe that Red John (Bret Stiles) is seeking for a successor and that's why all of the crimes have been committed for random members (and because of the illness of Stiles too), and the successor is the one who spoke with patrick's doctor.

But if it's not.. hopefully it will be something good in terms of the conections and clues across the story.

P.S: It would be fun if someone from the CBI like Van Pelt or Rigsby is Red John or of the bad ones.
P.SS: The same with Patridge.