I think maybe Lazarus is a Red John fan and he want to brink RJ back to life but with his own type of crimes, very simillar with RJ crime scenes. I hope that in this last 2episodes at least will be mention the name : Red John. And another litlle hope for your theories with PJ being RJ.

I posted the following on the Mentalist FB page as an adieu to the show we all love. Let them know how frustrated we are:
https://www.facebook.com/TheMentalist/posts/10153086135824861?comment_id=10153086310219861

Dear mister Heller,

There are so many ways you could have chosen to finish out the show, instead of the regrettable path you chose. Let's consider a few of your options:

#1. Have the remainder of season 6 and season 7 focus on Jane decoding coded list on the USB and hunting down the remaining BA members. As he caught each one, you could have them reveal (in a flashback) a small piece of the work they did for Red John, thus tying up the loose ends and clues you dropped throughout the series.

#2. The "psychic" Gabriel said Jane will only receive closure through the number "3". Jane has killed 2 Red Johns so far. What if you made the 3rd one the real Red John? RJ could either kill Lisbon on their wedding night (allusion to Frankenstein - we all know how you love your references), and Jane could kill him in the finale. Or you could just end the series with a red smiley face and leave us to imagine how Jane would pursue him. Or you could continue the story on another network in the rumored season 8 (more money for you!)

#3. Have Jane and Lisbon get their happy ever after. Then as we fade to black, it cuts to a scene of Red John keeping Jane in a comatose state in a small room (like Kristina Frye). Everything after the bomb in Jane's house was a fiction that Red John implanted in Jane's mind to give him peace. Have you seen Repo Man? Like that.

#4. Have Jane realize that he was Red John all along - that he's had a split personality disorder. He woke up in the field with no memory of how he got there, and we find Gabriel dead? Maybe Jane did it.

This is not my day job; I find it difficult to believe that a highly paid team of writers couldn't come up with something like this.

For future reference, it might be a good idea to listen to your actors. Simon Baker knows Patrick Jane is a tragic character - the man has been playing him for how many years now? You could also have handed the reins over to Baker before the fiasco of seasons 6 and 7.

#2, #3, or #4 are still possible. Of course, we all know they'll never materialize - you have to cater to the contigent of insipid "OMG JANE AND LISBON WEDDING" fans, of which there seem to be an abundance on this page.

It's just a crying shame the way a once-brilliant show has been mangled.

So...Maybe I'm just getting bored after season 6 and 7 which are quite uneventful when compared with the 5 others... Or maybe I'm just wishing for a finale that is as twisted, original and surprising as the whole show but, here's what I think, or at least the start of it: I've read Theresa90's theory, which seemed a bit far-fetched at the time, I must confess. But then, THEN, I realized a few things in yesterday's episode which actually sustain this theory... Especially the most far-fetched points!! Here are the things I noticed : 

First: The one that got killed was a 'psychic'... And we all know Jane doesn't believe in psychics and even despises them. Strangely enough, Gabriel got killed because he was a 'fake', as written on his arm... Now, isn't it strange that the guy that Jane is apparently the only one to despise should die exactly when Jane feels insecure enough to spend nights away from Lisbon?

Second: There always seem to be an event triggering the murders linked to Red John. Now, I thought a lot about what the number 3 could mean... As I'm sure you also did. Well, what if 3 referred to Jane and Lisbon + a baby? Some seem to think Lisbon is pregnant, basing themselves on a photo of the finale... That's a thin clue, but lets imagine she is... We're sure Jane would know before she even tells him, right?I will conclude those two points with a Theresa90's observation about narcissism... Don't you think that the fact that a 'psychic' would be right about the number 3 is enough of a reason for a highly clever killer struggling with narcissism to kill?

I also thought about that second personality... And I remembered the moment Jane woke up in the grass and when he told Abbott he had no idea where he was...
Anyway... That's thin, I know but, I'm really hopping for a massive surprise in the finale!

Do You see how Patrick Jane looks at the moon? Do You remember that moment with Lisbon in camper when he wasn't sleeping? Day before They had to capture hitman in hotel. I feel that his speach was about what will come in the final episode. Lisbon had not understood what he was talking about at all. He was more talking with himself then with her.

Doesn´t this seem too familiar; 1. A serial killer who has been active for a long time...2. He leaves specific clues/symbols on the crime scene (RJ had the smiley, this one takes fingernails from his victims...)3. A "psychic" goes on television and talks about him as if he knew him, which angers him and he kills that "psychic" and his family (sister)...4. He is eager to show that the psychic is fake (remember RJ´s note on PJ´s door before he noticed his family´s bodies)5.  Red john is dead, and Lazarus means raised from the dead...
But given all of these clues, and soooo many given before them, I think that this series will end without the slightest mention of Red John.....Sad.

COULDN"T THEY JUST DO AN ALTERNATE ENDING TO THAT DAMNED RJ ARC?

God, this is the only way to appease all of us. I hated Season 6!

I loved the first three seasons (and I liked the next two) and have seen every episodes so many times. But, i just think the next seasons sort of took a downward spiral, and this show is just six feet under.

Just watching as a sense of loyalty. I have to thank you guys for giving me a sense of comfort, knowing I'm not the only Mentalist fan who hated the past seasons. 

Heller, please, just give us a good, no, a brilliant alternate ending. It doesn't even have to be in CBS.