I'm curious about Bran stark. He is a warg and instead of the ability to see and act through one spirit animal, he can warg into other humans and animals. Will he warg into one of the dragons? Will he warg into one of the key players from the different factions?
His ability is obviously going to come into play at some point in a key way.
Yes, as I said some somewhere...I think Dany, Jon, and Tyrion (att Targs imo) will join together to eventually face the walkers. Obviously dragon fire (or anything forged with it) is the key to their destruction and yes, Bran will play a large role in controlling them I think.
Then comes the other question. You have 3 people who would then be rightful heirs to the throne. If each have a dragon, each come up with their own armies, so on and so forth, how do you dispute who gets the throne? Rock, paper, scissors is out of the question.
I think everyone will have to join forces to beat the walkers. Jon and Dany will form an alliance but when it comes down to sitting on the throne, I believe he will either yield to Dany, marry Dany, or he'll die in the process. Remember Martin said the ending is "bittersweet" so my guess is he'll die.
What would that make Robert Baratheon's bastard (Gendry) who we haven't seen since season 3? Will he have a final say in being an heir to the Iron Throne?
Also -- remember a few episodes back when Cersei visited that scientist-like guy in King's Landing (whose name is escaping me at this point) and he had what appeared to be a body moving under a sheet? Wonder what (or who) that will turn out to be...