Season 7 will start with a two-parter where the armies of the North, South and East attack King's Landing simultaneously. Cersei, Jaime and the Mountain will be roasted alive by Drogon on a balcony in the Red Keep (Cersei and Jaime will be hugging each other - Ser Clegane will kind of explode from being cooked in his armor as his body expands).
After the victory, Gendry will arrive in his rowboat (remember him?). Then the third episode starts. Dany marries Gendry (the last Baratheon). Jon Snow marries Sansa and goes back to Winterfell. Yara hooks up with Missendei (the half-and-half hottie Dany freed) and takes her back to the Iron Islands - nekkidness ensues. After rejecting Tormund's advances, Brienne relents and they marry - nekkidness ensues. They become the protectors of the girl-Queen Lyanna at House Mormont. Tyrion becomes head of House Lannister, marries all three Sand Snakes and resigns as Hand of the Queen. Samwell becomes Maester to King's Landing. The Hound, Ser Davos and Bronn get into the maritime smuggling business with amusing hijinks.
The above will take about six episodes leaving the final two where everyone has to get together again to beat back/destroy the White Walkers.
THE END