Well, we know who was honking the horn.
Without over-spoiling, it seems odd that the W's have no firearms. Nearly everyone and their brother has a gun, even if it's just one or a few for a group. With the savageness of the W's, it seems like they should have guns to spare. Unless there is something even more sinister going on that forces them not to have any, given the one W's comment at the end of the episode. Also, do we know who took Rick's hidden Glock last season?
Also I guess Carol's secret is out.
Though I would have kept someone alive for intel.