WARNING - CONTAINS SPOILERS AND POTENTIAL SPOILERS (if I am right about certain things) ABOUT GAME OF THRONES. If you don't want to know about what just happened and what could happen, then don't read any more. You have been warned...
Still here? Ok, then let's begin.
Let's start with the Game of Thrones Season 5 finale. It seems that people were still shocked by the ending, even though book 5 ends in more or less the same way; Jon Snow is stabbed at Castle Black and left for dead. The cry of thousands of angry fan-girls (and boys) was heard loudly across the internet, but let me see if I can put those heartbroken souls at ease? To do this, we need to go back and look at a few things that have happened over the years and speculate on what is to come.
First, and most importantly, let's talk about the link between Dragons and magic in the world of Game of Thrones. Up until Daenerys's dragons were born, there was very little - if any - real magic left in the world. Once the dragons were born however, suddenly things that had been impossible to do before were now being done. The Wildfire used on Stanis' fleet, the Red Priest Thoros of Myr's ability to resurrect those who have died, Millisandre's ability to create shadow warriors and cause events to take place. All of this stems from the inherent magical ability of dragons, including but not limited to their dragon blood.
Recall, Daenerys on several occasions mentioned having dragon blood? This is what kept her from burning her hands when incubating the dragon eggs and from burning when she entered Khal Drogo's funeral pyre to hatch her dragons. At some point in the past, somehow, dragon blood was infused into the Targaryen bloodline. That bloodline, traveled down to the Baratheon family via Princess Rhaelle Targaryen, who was married to Ormund Baratheon and was mother of Steffon, who was the father of Robert, Stannis and Renly. What the Red Priestess Millisandre refers to as "King's Blood", is in fact, the Dragon Blood, passed down through the Targaryen line. It is this which allows her to use that blood to perform rituals and magic which would otherwise be impossible.
"Ok, so what does this have to do with Jon Snow?" you ask. Well this is where we get into a bit of conjecture and prediction, so bear with me a moment. We must first ask ourselves, "Who is Jon Snow's mother?" That question has never been answered so far in the books or the show but there is a theory (one that I personally subscribe to) which is that Jon was not Ned Stark's son at all, but was in fact the child of his sister Lyanna Stark, who had been betrothed to Robert Baratheon but was abducted by Rhaegar Targaryen. The circumstances of her death are shrouded in mystery other than the fact that we know she died in her brother's arms pleading "Promise me Ned!" What did she ask him to promise? I believe she made him promise to care for her child. The child of Lyanna Stark and Rhaegar Targaryen, who Ned returned home from war and named Jon Snow. Not being able to tell his friend Robert about the child's true parentage - given that Robert was on a Targaryen killing spree - he lied about having slept with a commoner and raised the child as his own.
Now, let's jump back up to the present and the death of Jon Snow; betrayed and murdered by his fellow Night's Watch. As the credits rolled, we see Jon lying on the snow in a pool of his own blood. Based upon what we have already discussed, there are several important elements now at play.
First off, is the blood which as we have already mentioned can be used to power magic. Secondly we have the ability of the red priests to raise the dead. Is it just co-incidence that Millisandre road back to Castle Black just before Jon was murdered? I believe that she will find him and bring him back to life.
That said, here is something else of crucial importance; the oath of the Night's Watch. In particular the very first line. "Night gathers, and now my watch begins. It shall not end until my death." What does this mean for Jon Snow? He died. His fellow crows saw him die. His watch is over. If he is resurrected that means he is a free man. Free to take up the mantel of Lord of Winterfell, lead the Wildling army against the Boltons who now occupy his ancestral home and then, turn his attention back to the White Walkers.
How will he defeat the zombie kings of the north and their undead army? There are 2 things which we know will kill them. Dragon forged weapons (Valyrian Steel and Obsidian) and fire. Both of these things can be accomplished with Dragons. Jon's cousin Daenerys has several dragons, which if ridden into battle could make short work of the undead hordes beyond the wall. And if Jon and Daenerys were to marry, not only would they have saved all of Westeros from the White Walker invasion, but Jon being a Stark and Lord of Winterfell would solidify Daenerys's claim to the Iron Throne, putting all of the North behind her banner.
All hail Queen Daenerys Targaryen and King Jon Stark. Long may they reign!