Glad it turned out to be the Wolves and not the Whisperers, as some had been speculating online. I'm not so sure this is _____'s gang though, I think these schmoes may be more akin to the Scavengers from the comics. Leaderless riff-raff who just move from place to place looting and killing. That was some crazy ass walker trap though!
Haven't read forward into the comics yet to know about the Wolves, Whisperer's and whoever is "blank" here. I wonder though if the leader of the Wolves is the guy that Aaron was talking about with Darryl (Davidson if remember correctly?). I can't see why they would have "named" him during that part of the discussion if he wasn't going to come back and haunt the Alexandrites.
I thoroughly enjoyed the finale last night. I thought they tied up the stories nicely and set up the next wave for Season 6. I was on the edge of my seats a few times wondering what was going to go down. Didn't have to kill off a main character to keep me in suspense.