Jane has figured out the key to Red John's Identity.  Red John will reveal himself to Jane.  It doesnt matter who is Red John, so letting bgo is his way of pullling in Red John.  Without the game, life would seem to be uninteresting for both of them.  With that said, as of this episode, noone but Bruno Heller and maybe a couple writers may know the identity of Red John, but its possible noone does.  It may be an internal game to see who can wrap up the story the best.  So guessing who Red John is is almost moot, because the writers themselves don't know who.  Looking at reactions in the faces of the actors or how they act doesnt help either, because I'm sure some of these actors have the chops to be something totally different.  I had a dream tell me that it was Ray Haffner, so I'll go with that.