I really like Game of Thrones, but they take an awfully long time to build up the action. It's almost like they have too much going on, and not enough time to show it all. If you don't pay attention to each and every word, you're going to miss some clues about the whole series.
*spoiler alert*
My theories:
John Snow can't be dead. John Snow isn't Eddard Stark's bastard son, but Eddard's sister's son with the Mad King. Robert Strong is the reanimated Mountain. Tyrion isn't Tywin's real son either, but a Targaryen and Lannister. So it seems the three lead characters seem to be John Snow, Tyrion Lannister, and Daenerys Targaryen. All having Dragon Blood.... All matching the prophecy, the three dragon riders.
Just theories, don't hate.