I'm far and away from being an "insider" just my sources are the same as any other avid fan of the show/story. That roamersandlurkers.com is where I get the bulk of my info. Some also comes from AMC website.Goodness that is a long wait!!
I have not read any of the stories in print and but I wonder, since you are an "insider"! do you have any clues about Merle (Daryl's brother) and does he ever return? And in what form!
As for Merle, it is said that he will make an appearance during season 3 but not precisely when. I suppose he'll be there in human form, seeking vengeance and as shock/cliff-hanger at the end of one of the episodes. It'll be interesting to the followers because of his younger brother Daryl (no, the OTHER one named Daryl
According to the author/creator/writer of the series, he regrets the amputation in the graphic novel, and it's possible since they've done other deviations that the character will keep the appendage in the show.There's a whole prison and small town of red shirts waiting to get eaten.
Prison means the story really hits it's stride. The Warden, a couple really big deaths including main characters. One of the main characters looses a limb (wonder how they are gonna do that in the show on a weekly basis?).
You're one of the few (myself included) that is not upset about the deviations from the graphic-novel/comic story line(s). Many comic purists are decrying the changes. The comic (which I've read only sparingly) is very graphic compared to what's been seen on the tv show thus far. The show is graphic as it is for television and I'm constantly amazed at what they've been getting away with as far as gore, sex, language, thematic elements.I was curious how they're going to handle that myself. The show has already deviated from the comic (which is ok with me in my opinion), so some of the key story lines/deaths could be pushed out and/or changed completely (like in Shane's case). I can't believe I have to wait until freaking Oct for the new season.