Say hello to the beginning of the end.
The show went into syndication earlier this week with Spike TV.
I predict that the next season of the Shield will be the last.
Lem will come back as a "spirit" only seen to Shane a.k.a Cletus Van Damme and play on his conscience. Vic will spend the next season searching for Lem's killer, and when he finds out it's Shane, Vic will kill him. At that point Vic will turn himself in and confess to everything (the money train, killing Terry, etc.). He'll be prosecuted, convicted, jailed, and Ronnie will go free as Vic will protect him. Clean cut and simple.