HBO's mega-hit Game of Thrones has been off the air for more than a year now, and fans are still months away from getting any new episodes. Details about what's to come have been relatively scarce, but HBO chief Richard Plepler is one who has already seen all six installments that will comprise the eighth and final season. While Plepler obviously isn't going to drop tons of spoilers about what's in store, he shared his thoughts on what he got to see: