I have been rereading some of the old topics (listed below) on this forum as well as all of the released print materials. I paid particular attention to the topics "All the main characters will die" and "Do you think any Frey will survive?". I believe most of the fans are failing to grasp what Mr. George R. R. Martin is saying. So let me start with Aenarion's posting "Do you think any Frey will survive?" and then move onto to Annalee's "All the main characters will die."
The purpose of this plot is not so the Starks can get what they think is justice. The Starks are as much wrong as the next family over. I know this won't sell to the Stark fans but that is my opinion of where I think the story is headed. The Freys are going to die but not because of some comeuppance for their part in the red wedding. They will die by dint of being in the wrong place. Their Twins is in the path of winter and the white walkers. Winter kills and leaves only the few to keep the species going. I will come back to this later because this part of the nature that winter kills is important to the plot.
What has been going on in the plot to this point? The plot has nicely done the job of setting up very understandable reasons why these families should hate one another. The Freys hate the Starks for understandable of reasons, Robb dumped on them. The Starks hate the Freys and the Boltons for understandable reasons, the red wedding massacre. The Targaryens hate the Lannisters for good reason, they killed Aerys, Rhaenys, and Elia. The Martells hate the Lannisters for the same. The Starks hate the Lannisters. The Starks hate Theon Greyjoy. The Starks hate the Targaryens. The Targaryens hate the Starks and the Baratheons for killing Rhaegar. The Baratheons hate the Targaryens because Aerys killed Brandon and Rickard. The Lannisters will go batshit crazy with rage when they learn the Tyrells killed Joffrey. The civilized parts of Westeros hate the free folk for their raiding ways. The free folk hate the kneelers for taking freedom away. The religions want to promote themselves at the expense of competing beliefs. All of these people have good reasons to hate the people that they do hate. Our author has done a good of job setting them up against each other. Families vs. families, religion vs. religion, individual vs. individual, culture vs. other culture, male vs female. So there you have it, he set them up to oppose the other for reasons that are justifiable to them. Most of you are with me so far but I will lose you in the next paragraph.
This story is not about getting justice for the sins of one family against another. It's about setting those differences aside in the interest of survival. That means Arya, Doran, Lady Stoneheart, Cersei, and Ramsay will have to go. They are the worst offenders and impedes any chance of cooperation. L-S and Arya are messed up with thoughts of revenge. What is happening in the west is an environmental disaster in the making. The opposite of global warming. The White walkers are like communicable disease that turn humans into zombies. The author can do something really bizarre and make peace possible with the others that will require extreme sacrifice on each and every human in the land. Which we know is possible. Craster did it. The author's message is this. All grievances should be set aside in the interest of survival. The parties do not have to like one another and forgiveness is out of the realm of possibility but discipline can allow these parties to work together for the common good.
Here's the bad part. The author wants to send a message. He doesn't claim to have all of the answers because life is complex in his fiction and in real life. He won't claim to know it all. But his point is, the real world is facing enormous problems and unless people can set aside their differences, things will only get worse. He wants to generate discussion and lead people to make better decisions. It's been said and it's been written, Mr. Martin is harsh but practical. He knows another story with a happy ending is not going to serve to deliver his message. I predict that the people of Westeros will continue to behave as they have been doing and most of the people will be wiped out. They will continue to put grievance, pride, and emotional attachment ahead of cooperation. Their prized castles will crumble. Lords and ladies will freeze to death in their castles as easily as the poor man in his hovel. Feudalism will end because civilization will be turned backwards to the primitive. The Starks will have no better chance of surviving than the Freys and they will be just as responsible for the mess as the Boltons and the Lannisters. Everyone will be partly to blame.
All the fighting and bitching between the families will continue until it's too late. It's not easy to set aside the wedding massacre but if it were easy then everybody would choose peace and cooperation. It's hard to forgive a man who broke his promise to marry your daughter after your family fought for him and lost its first born son in his service. It's not easy to reswear fealty to a king that holds your rather in prison and attacked your mother's family but if Robb had done it how better off the north would be today. Jon Arryn just couldn't put his honor aside and sacrifice Robert and Ned but chose instead to start a rebellion that killed tens of thousands of people that had nothing to do with the feud between the Targaryens and the Starks. It's not easy to send two boys that you love to execution for the possible crimes of their families but that was preferable to sending tens of thousands of men to fight in a war. Jon loved Arya and he wanted to rescue her from Ramsay but it was the wrong course of action. Jon knew as well as anyone what is coming for them and he should have been thinking with his head instead of his heart. He should have made peace with the Boltons no matter what the cost to the Stark family. Keeping as many men alive to defend the north should have been Jon's priority instead of Arya. He should have counseled Stannis to make peace with the Lannisters and take the Black. There are only two armed conflict that helped more people than it harmed and the ones that died, died for a good cause. The much maligned Edmure Tully's call to arms to defend his people against the raiding army of the Lannisters. Daenerys Targaryen's war against slavery in Essos. The first is pure self-defense and the second is the fight to rescue slaves from their sadistic owners.
Winter is when people die. Count on it. Most of the people in Westeros will die and only a few will survive.