Ok, so I took a brief look at the trivia on the Season 4 page and it referred to a plane crash set, and the reprisal of Chase and Kelly. So what exactly does this plane crash mean? A helicopter crash brought forth The Governor, so what or who will this plane crash bring forth? I took a look at some pages on Google also referring to this, because I though someone was just defacing the page.
Also Chase and Kelly being brought back. I personally don't like the idea of that at all. Maybe the two have a connection, who knows? Or here is another suggestion, in the first picture of Season 4, when Rick is seen staring at something, I believe he must have come across the plane crash.
So what does everybody think?