Just to point out that Haffner went from being the third less liked suspect of the seven to being third favorite and is almost catching Bertram. In one week! Good job Heller...

Let's assume, from the episode synopsis that people have posted, that the list is a fake.  (I was one who thought the list was fake all along)
If the list is fake, doesn't that make the killing of Brett Partridge Patrick's fault!?  I think it does, and I think there is a reason why:
Just like Patrick led Red John to James Panzer, I think that Brett Partridge definitely could have been a killer himself.  He was obsessed with Red John, and probably tried to become a serial killer just like him.
The hole in that theory would be: "Well how did Jane know that RJ would kill Brett and not the others?"
We'll have to wait and see...
But there is ONE thing that I think is blatantly obvious.  Patrick Jane has a plan.  He has a BIG plan...
Remember the depths that he went to with his first plant to catch Red John?  Going into a depression, getting arrested, faking Lisbon's death...
The list HAS TO BE FAKE. 
At this point, I think everything that happens, we have to assume as being part of Patrick's plan.
Lisbon telling Grace, Grace telling Rigsby, Rigsby telling Cho...All part of the plan...
I would assume that this season, it will appear that Red John is going to continue being one step ahead of Patrick, and the chase will get more and more intense, and it will appear that Red John has won...but then Patrick will have his usual Ace up his sleeve, leading to him (or maybe Lisbon) killing Red John!!

(SIDE THEORY)--> I think that Patrick KNOWS that Lisbon will NOT let him kill Red John.  She wants to bring him to justice.  Patrick knows that wont work, so he's going to set it up to where Lisbon is put in a position where SHE has to kill Red John!  (ex: RJ is about to kill Patrick)

All that aside, I think that who Red John is may be a bit of a disappointment like Bruno said, BUT the surprise will be who is WORKING with Red John and how far his reach really goes.  Is Grace a part of RJ's team?  CBI Ron?  Is the entire list of 7 people RJ associates?
I just hope that this season is a good one and doesn't take a bad turn like Dexter!

I just realized that Ray Haffner is Red John. When Ray visits Lisbon in the hospital he says... "one of these days, you and me will have the time." I'm thinking that this is in reference to Red John not having the time to kill her before hand. Please note, this theory only works if Red John intended to kill Lisbon.

Thats It , Red John Is Ray Haffner
remember when red john visit rosalend harker and drinked tea
we all saw his fingers and his hand , it must be the hands of someone young
that throws bret stiles off the list
also NOT reede smith because he is fat and have fat fingers
for the sherrif i didnt find any photo for his hand but from s6xe2 when he was with bertram and smith he's hands are like red john's
anyway i will put him in the list of suspects
bertram he is officialy NOT red john
because ha have a hand more like bret stile's hand
now we have 3 suspects left
sherrif , bob kirkland and ray haffner
we all saw that red john when he drinked tea .. he hold the cup with his left hand
so thats make the sherrif out of the list because he usued his right hand to hold his hat when he was with bertram and agent smih
so now we have just two suspects
Bob Kirkland and Ray Haffner
kirkland when he killed jason in the hospital he usued his right hand
so nope red john is not kikrkland
wich means we have now just ray haffner
and ray haffner is red john
why ?
 he hold the files with his left hand in this photo http://images3.wikia.nocookie.net/__cb20130415165434/thementalist/de/images/4/4e/402.jpg
also here http://mytvseriesapp.com/screenshot-82459-4159275-little_red_book.jpg
so he use his left hand to hold things
like who ? like red john
and he is the only one who cales agent lisbon " teresa "
brett bartridge also called here terersa but he is dead
walter mashburn can not be red john if course even if h also calles here teresa
because he dont seem like that kind of person who kill people and enjoy it
ladies and gentelmen
Ray Haffner = Red John

2 quick questions i wanna hear your answers to before I talk about my theory

Is Bertram usually armed?  If he isn't, I don't think he could be RJ.  Out of the 6 remaining suspects we know 4 of them are always armed with a weapon.  Stiles and Bertram, I'm not sure about.  Stiles seems to have more body guards and personal protection though.

Why did RJ send Timothy Carter to kill Hightower? or in other words why did RJ want Hightower dead?

I think its Haffner, partly because he's not too obvious but too suspicious either.  In 6X02, he sent the nurse in to ask about Carmen Lee.  On top of that, he wanted to be with Lisbon alone in the room without Jane there. 

1.) Patridge is dead! Get over it. He is not RJ. I think RJ killed him because he found some evidence against him.
2.) Kirkland is NOT RJ. It is impossible! If he hadn't had a face surgery (which i strongly assume, because that would be just cheap and lame) he cant be Red John, because Lennon would have recognized him as RJ. So it is impossible that he is RJ. I really dont understand how people can keep saying he is Red John. He is also not after Red John, because he would have asked Lennon to tell him who Red John is. He works for Red John, - as simple as that.
3.) Stiles is NOT Red John. It is impossible. Stiles was already the leader of visualize back at the time when the RJ smiley was painted on the ellison barn. The priest said some kid painted the RJ smiley on the barn, - do you really think anyone would refer to the LEADER of Visualize as of some kid?! He would have simply said the leader of visualize painted that smiley on the barn. So it is absolutely impossible that Stiles could be RJ. Not because of his age, but because the leader of visualize was back then not just some kid.
4.) I cant say for sure Reede Smith is not RJ, but I just think he isnt. I dont have a valid reason why he is not RJ, but I just dont see him as RJ.  Neither is McAllister. Thats just my opinion, I cant give proof for that. But I think that McAllister and Reede Smith were in Bertrams office not because they are allies of Red John, but because they are up to something else, a secret project or some dark and illegal affairs. The fact that Reede Smith told Bertram, that it is his job, to find out, how much Jane knows, I think he wasnt refering to how much Jane knows about Red John, but how much he knows of the stuff Bertram, McAllister and Reede are up to.
4.) My strongest Red John suspects are Bertram and Haffner. Till end of season 5 i was convinced RJ is Bertram, but after season 6 episode 2, I have that gut feeling that it could be Haffner.
Reasons why Haffner could be RJ:
- Haffner is a known Visualize Member. He could have been at Elliston Farm.
- Haffner said in one of the episodes to Lisbon, "that he was a kid, that was heading to a bad direction and that Visualize helped him to straighten him out." - What if Visualize tried to straighten him out but didnt succeed? Maybe Haffner tried to become better with the help of Visualize , thus didnt kill for many years, but at the end his evil traits won and he started killing again. This would also explain why Stiles knows who Red John is (Haffner), but at the same time, doesnt reveal the identity of RJ/Haffner, because he doesnt want Visualize to get into trouble.
- If Haffner is RJ, then Jane didnt trick him to lose his job and to get Lisbon back as the boss back in season 4. If he is RJ he wanted it and did it on purpose, like in "His right red hand" where Rebecca said that he wanted him to be back on the RJ case". RJ wants Janes team to be after him.
- The psychiatrist said RJ has no family. If Haffner came as a child already to Visualize it indicates that he has no family or family ties. He is also not married.
- Unfortunately we dont know much about Haffner that could prove that he is RJ.

Reasons why Bertram could be RJ:
- betram military bravery award in his office from the gulf war. Carter, who he killed was a veteran from the gulf war, could be a link there.
- Bertram is a passionate fisherman. (as you can see in his office)
- Bertram said to Jane in S06 E02: "Why did lisbon go into the house, because when the call came in, neither Red John or Patridge was mentioned." - I ask myself, - how did Bertram know, what was said in the call to Lisbon, if he didnt call himself?! This is a bit thin, but worth taking into consideration.

I am more inclined to Haffner, - I have the feeling that Bertram might be only a Red Herring. Happy to hear your thoughts here.

WHY Lisbon didn't tell Jane that HAFFNER came to see her in the hospital???