If you've seen any of the newer little clips or tv spots they've put up in the last couple days, you'll see clips of walkers ON the farm, sometime soon. Also, I caught one earlier tonight where Daryl's holding a gun toward the camera and saying "*something something* my brother." So I'm really hoping we see Merle again by the end of the season.
Also, I'm still 100% sure that he's going to be the TV show's Governor. Sure, I know I could be wrong, but everything seems to be pointing to that.
Edit: lul at Talking Dead when Dave Navarro said he's a huge fan of the show, then asked, "Uhh, Dale...He's that old guy, right?"