ASOAIF is the perfect universe for Total War, especially after they pulled off the Total Warhammer graphics and animations. Dragons, 7 Great Houses, each as an individual faction, Dothraki as horde factions. Perfectly achievable and they wouldn't have to make as many skeletons or animations besides White Walkers, COTF, and Dragons. Diplomacy as a throwback to Total War Eras games can be done.