Red John's Last Murder.

I know this is a bit Off Topic, but I've been seeing this for the last three or so seasons.
There has been a fundemental PROBLEM with "The Mentalist" from its start that Bruno Heller has always faced.  "What happens when Red John is CAUGHT."  For Jane, his work with the CBI is OVER.  He's avenged his Family.  His work is DONE.  That, seemingly CONCLUDES the Series.  That's why BH has teased us so miserably the last 5 years with Finales hinting at Red John's end with increasingly preposterous endings.
And I sussed out a way for the series to continue on after Red John's demise.  And you're not going to like it.
What is Red John's relationship with Patrick Jane?  Why doesn't he simply MURDER his biggest and cleverest foe or mow down his CBI team to force Jane to give up?  Why would he have his knife at Lisbon's neck and not kill her?  If he wanted to discourage Jane from pursuing him, why doesn't he just mow down Lisbon's team?
Red John has been grooming Jane as his SUCCESSOR.  He smells Jane's cold-blooded Sociopathy and actively wants to groom Jane as his successor.  So that if he is caught and killed, Jane will continue his legacy so that even in Death, Red John will always live on!  
Jane is key to his immortality.  Not his weak-minded Cult, but someone truly capable of taking on his mantle.  That's why Red John has spared Jane's Death so many times.  RJ wants Jane to be GRATEFUL to RJ and the only person RJ trusts to perpetuate his legacy.
Jane has been too strong.  He hasn't fallen for any of RJ's tricks.  I think Red John has given up on Jane.  He wants someone NEW to GROOM.  And that person is WAYNE RIGSBY.
RJ wanted to groom Jane into a cold, Sociopathic Killer like himself.  He has FAILED.  I think RJ has given up on Jane and moved on to Plan B.  He accepts that Jane will eventually hunt him down and kill him.
Jane was too strong to fall for RJ's manipulative tricks.  But he sees EASY PREY in Rigsby.  Rigsby's a Hot Head.
This is my vision of RJ's REVENGE against Jane:  When Jane has RJ finally hunted down, RJ will intruct his Cult to HUNT DOWN and KILL GRACE and Rigsby's SON.  Red John's final murder.  Let Rigsby feel the pain that Jane had felt.
Red John couldn't convert Jane into his chosen successor.  Red John LOST.  In his place, his Cult of devotees and wannabes turn to absolute CHAOS, with Rigsby wanting to go MEDIEVAL against anything smelling vaguely of Red John.  Red John rules beyond the Grave by the swath of Chaos left behind in his Wake.  Disciples and Wannabes war against Law Enforcement that just wants to smack down anything vaguely Red John.
Cut off the Head of the Hydra and only more problems emerge.