I don't think that its possible to spin this out for much longer without losing the audience so I think the identity of rj will be revealed by the end of this series. However, as there will be another series there will have to be a twist that stops the team arresting him. We know that rj has people in all areas of government so I think that they will find some way of discrediting the team. In which case they will have to go rogue in order to catch rj and clear their names in the next series (this is what I hope will happen anyway as they all have to play by jane's rules).
As for rj. We know that from the red barn episode that jr started as a disciple of stiles. So rj's organization is likely to be a splinter of visualize, using the same mental tricks and discipline but with dedicated to killing. Such an organization is likely to be very useful to organizations such as homeland/CIA etc and so could be providing training or operatives for them. Whereby the rj killings could be the final part of the training. This would be supported by the exchange between kirkland and Bertram in I think it was 'there will be blood' where kirkland asked can we trust her. And Bertram answered I wouldn't trust anyone with this.
I also want to know what's the deal with Laroche. He is definitely hiding something. And what was in his safe anyway? We never did find out. I can so easily see him as rj as he is clearly intelligent enough and have similar interests. He's easily a match for pj. And his lack of personality could easily be a cover to hide a more vibrant personality. But somehow I doubt it. I definitely believe we haven't seem the last of him.
