I read a theory that I found interesting, which reads as follows:
in the comic-con season 4 trailer, we see in the finale scene to Daryl, Michonne, Bob and Tyresse in the car, they listen a voice of a female that says: "Sanctuary... those who arrive... survive".
but in the episode 4x03 no happened the same, this time we heard a man with much interference, says a few words, that which can be heard is: "terminus... survive... a lie... those... (walker begins to appear).
so maybe this man could be warning that the message is false? and what he meant was: "terminus, the message of survive, is a lie, those who arrive will dead" or something?... and could be Father Gabriel who fled and is warning of the place?... just a theory xD or maybe it's a mistake and I misunderstood the words :S
what you think?
the female voice in the trailer:
the male voice in the episode: