VIDEO : HBO Boss Reveals ?Game Of Thrones? Prequels Timeline

HBO's biggest hit, "Game of Thrones," won't return until 2019. Programming president Casey Bloys told reporters at the Television Critics Association's winter press tour Thursday that co-showrunners David Benioff and Dan Weiss need to ?take the time they need to do the show at its highest level of quality." When asked about the show's prequels, Bloys said, ?There?s not going to be anything on our air for a least a year after Game of Thrones airs. We?re not using the final season to launch a new show or anything like that."