Other GOT spinoff series in production
Here are general summaries of a few additional spinoffs in early development
(1) Sam Tarly: The College Years. Sam decides to return to Maester school to earn his degree. Sam and Hodor are roommates, and band together with Bran to start the Tri-Epsilon Fraternity House. But trouble arises when Tormund Giantsbane's fraternity storms the Tri-Eps' house and infects Bran with dragonscale.
(2) The Long Winter. Jon Snow returns to the wall. He marries and has 3 children. He soon is infected with wanderlust, and takes his family on a covered wagon journey to the west, and settle on small farm outside of a town. But soon a new winter falls, and Jon and his family are forced to move into town with the other citizens. The family begins to starve, but luckily Jon finds food in a hole in the wall. His middle daughter goes on to write a series of popular children's books detailing their adventures.
(3) The New World. Arya Stark sets sail after convincing the queen of Winterfell that she can reach the vast riches of Volantis by sailing west around the world. She reaches land after several months at sea, and then takes a bunch of natives she refers to as "Volantians" hostage. Upon her return to Winterfell with the imprisoned Volantians, the Queen points out that they are in fact members of the Yi Ti tribe. In an effort to establish diplomatic relations, the Queen executes the Volantians and sends Arya on a return voyage with their shrunken heads to trade for gold and valuable spices.