Hey everyone,
One of the theorists had mentioned before something like the one I will be. I just wanted to add up some reasons to it. The theory in essence is related to RJ being one of the disciples of Brett Stiles once but overpowered him in terms of mental talent and personal charisma which had resulted with breaking up from the Visualize and forming up a kill-oriented semi-cult. When you observe Stiles's behavior against RJ phenomenon, you can see the fear and hesitation in his eyes. He wants to help but obviously to some extent. He definitely knows more than he shows. Being that much left-in-the-middle can be explained in two ways : either he deeply loves him, or he's scared of him. First option can lead us to a conclusion that RJ was someone very close to him (maybe his own son or a son-like pupil) so even if he got hurt by him somehow, he still can't give up on him. Second option would only contain deep hate and fear all together. Either way, these two fellas are connected.
I'd like to get your attention to another point. Many people's lives and the general outline of many events/connections are way too much known to us so far. However, there are also many other elements which have just been touched a little and then left for re-opening I believe. Jane's past and it's recent reflections for example. What happened to his father, any details about his time in the mental institution, etc. The point I want to make here is, writers want to look stuck with whatever we are already discussing. However, there are many things to be covered out of these intact subjects and making very surprising connections with those shouldn't be so hard for such a crew of writers. Think about it. The final scene I imagine goes like this: RJ is exposed and arrested. Lisbon doesn't let Jane kill him. After hard struggles, Jane admits the fact that he can't kill him anymore and is kinda ok about him being arrested as at least he has some kind of punishment. With the relief given by this, he's having a calm conversation with someone we all know well in a silent atmosphere and then one move, only one move reveals the truth that the guy he's chatting is actually RJ and before even he knows, Jane puts a bullet in his head. Then the flashbacks connecting this little spark that enabled Jane to figure out that this guy was actually RJ is displayed in a well-worked manner and we all keep staring at the screen like dumbs thinking about how the hell this happened and how we missed those clues in the first place.
Because fellas, if anything like LOST or 6th sense happens, then Heller must be in grave danger since someone among the audience may become his own RJ.