Walter mashburn is coming back people wait for it and I am telling you that NO! one is best to be RJ in this entire show than walter. he will be the only element of surprise . If walter is not rj then  Patrick jane is RJ. It would have ment that tiger tiger  where the one who kill jane's family not knowing that he was rj but a regular man who skill an ability they would use to get rj by killing his family and making it look like rj  doings not knowing that the same man one the talk show slandering rj name is RJ, but infact jane  knows its not rj that killed his family because he is RJ so he is playing along  to get the entire group and everyone who was involve with his wife and daughter murder to make them pay for it. So if not Walter who I want it to be the jane hands down. it has to be that's the story they are making out of the show.