VIDEO : George R R Martin Says One of the ?Game of Thrones? Prequels ?Has Been Shelved?

At least one of the five ?Game of Thrones? prequels put into development at HBO ?has been shelved,? according to ?A Song of Ice and Fire? author George R. R. Martin. Martin didn?t specify which of the other four projects he was discussing, but HBO has one each from ?Thrones? alum Bryan Cogman, Max Borenstein (?Kong: Skull Island?), Brian Helgeland (?Legend?) and Carly Wray (?Mad Men,? ?The Leftovers?).