San Diego Comic-Con has become the Shangri-La, Eden, and Nirvana of pop culture events, all rolled into one package. When one hundred thousand people descend upon the San Diego convention center for the four day event, there is great anticipation for getting all their animation, manga, comic book, low brow art, B-grade movies, original art and collectible urban toy, needs met. It never disappoints, to be an adrenaline soaked event.
Publishers look for this time, to make special announcements and also roll out their plans for the upcoming year. Part of all of the fun is, when special limited editions are released only for those attending the San Diego Comic-Con. IDW is producing 2 special edition covers especially for this event. Dave Steven's Sketchbook and Walter Simonson's Thor Artist's Edition both will be represented with very limited edition covers. I believe, you can order both of these ahead of time through IDW's website, and then pick them up at the convention. Of course, you could take your chances, and try to purchase them from IDW's booth while you are there.