Daenaerys discovers that she was just imagining the dragons the whole time and everyone around her was just too polite to say anything. This discovery is made doubly traumatic by the fact she discovers this while trying to fight a khalasar on the back of one of them. The Khal takes pity on the crazy woman and packs her off to the khalasar where even by crone standards she is viewed as a little odd.
It turns out the 'controversy' in the Sansa chapters refers to a passage where she draws a cartoon of the prophet Muhammad and then sets fire to the Quran. Even Littlefinger thinks this is out of order.
Bran is only just starting to get the hang of being a tree when he is felled by a woodcutter. The children of the forest are dismayed by this and want to drown their sorrows, but they can't find any adults of the forest to go in the off license for them. All in all it's a horrible day. Fortunately the wood accrued is used to make lances so in a way Bran gets to live out his dream of being a knight in the tournaments. There is also a joke to be made about how you could refer to the splinters as Bran Flakes. Oh, and the woodcutter was Hodor.
Tyrion doesn't make it to Daenaerys on time. Then he kills the pigs. Then he laughs in Penny’s face. Then he puts a wig and some lipstick on the dog and says 'look Ser Jorah, it's Daenaerys returned and she's forgiven you!' Ser Jorah is taken in by the deception, and the pair live out their days in romantic harmony.
Stannis has a really horrible year, which he refers to as his Stannis Horriblis.
It turns out if you go back four or five generations, basically everybody is a secret Targ, which means that everybody in Westeros is now the heir to the throne. There’s a big fight, and I know what you're thinking' Greatjon wins. That’s the twist though, he doesn't win. Turns out he went on hunger strike in the Frey dungeons and now he's just one foot tall. Now he's the Tinyjon he's not so accomplished in the melee, although he's arguably four times as ferocious. Unfortunately the Westeros-wide melee ends in a gruesome Reservoir Dogs-esque tie. Only the people who didn't bother to get involved are still alive.
Luckily for Cersei, everyone forgot about her and started fighting, so we can suppose that technically Tommen is still king but hang on! Then the Hound shows up and kicks his head off just because he can, and he laughs in Cersei's face. Then he takes the helmet off. It's only bloody Jaime Lannister! He's escaped because Lady Stoneheart was just a mirage. Then Varys kills them both to preserve peace in the realm or something. Then he kills everyone else in Kings Landing.
Arya was wielding the fourth dagger that struck Jon Snow. By now she's become so desensitised to violence that this is her only way of showing affection. She's made her way to the Wall to throw a surprise party to celebrate him becoming Lord Commander, and unfortunately it's all gone a bit stabby for Arya again. She was only trying to show him she remembered his advice about the pointy end. The reason all the watchmen were crying was because she'd forgotten to put her face back on. On the bright side, Arya and Melisandre get on great.
Oh, and he's definitely dead.
The Others have been misjudged and basically keep themselves to themselves. Winter only lasts for a fortnight. Spring Break is awesome.
After most people kill each other Theon becomes king for some reason and one morning he wakes to discover his member has grown back. Theon is a pretty good king, and he restores peace to the realm, a feat which is made easier by the fact there are only 106 people still alive in Westeros. Unfortunately Theon is so delighted that his dong has grown back he insists his subjects address it as the 'prong that was promised' This takes the shine off things. Varys is rewarded for his one man genocide spree by being elevated to the trusted post of Hand of the King. The relationship between Theon and Varys is complicated by the fact that Varys' todger hasn't grown back. They don't really talk about it, but it's an elephant in the room.