An interview with the creator of Game of Thrones, George R.R. Martin by Entertainment Tonight, he explained that the prequel emphasizes “Westeros is a very different place,… “There’s no King’s Landing. There’s no Iron Throne. There are no Targaryens—Valyria has hardly begun to rise yet with its dragons and the great empire that it built. We’re dealing with a different and older world and hopefully that will be part of the fun of the series.”
This however makes sense since with the estimated time of story which predeates 5,000 years ago; Valyria, the Essos city that helped House Targaryen and their scaly friends rise to prominence. However, critiques wants the story unchanged with stunning characters, dragons, White walkers, and the likes. Winter is here!