If Heller is smart, he will make 'Lazarus' Red John himself, the next best thing, i.e. some kind of mentor figure out for revenge against Jane for killing his disciple, like Bret Stiles, who, like the fabled figure Lazarus, "shall return" from the dead. Bret Stiles fits PERFECTLY here. Unsolved murders, brainwashed followers, the promise of returning from the dead. Let Malcolm McDowell go out with the bang he deserves for what a splendid actor he is!

Anyone remember this scene?: https://www.youtube.com/watch?v=Jyw2odg92B4

But let's be real here, how smart is Bruno Heller for making Mcallister Red John? How smart is he for only deciding who Red John would be right before the season six finale? Not very, to me. But he can still save his integrity. Give us what we want, Heller!

Don't get your hopes up, but this is how I would write it. Bret Stiles as Lazarus/Red John/Red John's mentor.