Well, for now we are going to file this one in the rumor department. But it couldn’t be entirely unlikely due to the fact that the show was originally shopped as a movie before it became a television show. One of the folks over at Bloody Disgusting posted this:
With that said, I have some friends working closely with “The Walking Dead” crew and AMC who confirm with me rumblings of a feature film. But before you get your panties in a bunch, we’re only in the third season of the popular zombie show – adapted from Robert Kirkman’s astounding comic book – and when I say rumblings, I strongly suggest the idea has been passed off in non-business conversations. The show was originally shopped as a feature film before it went network, so the idea of ending the series with an hour and a half feature would be exciting. But as I stated before, “24,” “Lost” and “The Sopranos” had been rumored for years, and they all failed to make the jump.
So, pretty much its been talked about but the thing is we wouldn’t see anything for a few years. I’m pretty sure The Walking Dead has a few seasons left in it and AMC is going to take full advantage of that.