1. RW
Readers have been waiting for this moment since the announcement that these books were being turned into a TV show. The creators of the show even said their goal was to at least have this moment happen and they would be happy. They got their wish and season 3 will more likely than not have this near the end or at the end. Much of the previous reasons above to be excited all culminate to this moment. In fact, it would seem like season 2 was setting up for this moment as well. Needless to say, viewers will not know what is waiting for them in the shadows.
Notable mentions: Some important characters didn't make it to the list because of a variety of reasons. Namely Tyrion, who is undoubtedly, a fan favorite. His story actually ties in to at least two of the aforementioned reasons, but he's not the focal point in them. Don't expect him to just sit around though. Another character is Stannis (who readers see through the eyes of Davos). Spoilers! Davos lives and his story with Stannis is...underwhelming to say the least. The third book relies heavily on the number 1 reason this article mentions and the following aftermath of it as well. In fact, since no one knows where season three will end, it could very well include the memorable moment that happens after RW. In that case, reason 1.5 would be
the aftermath of RW. That's right, the third book has a second moment which readers have been looking forward to as well. Season 3 is probably going to blow viewers out of Blackwater, just like Stannis.