Depending on the quality of the pilot, the network will commission a full series.
In a press release, the show's description indicates it will take place following the Age of Heroes.
For fans anxious about accuracy, don't fret - the series will be created by George RR Martin, who wrote Game of Thrones' source material, the Song of Ice and Fire book series.
The channel has teased what Mr Martin described as "successor shows" in the past, announcing in May 2017 a number of writers who were working on these series. Notably, Bran the Builder is known for building The Wall, so that could be explored. "This story, A Song of Fire and Ice, is done".
As for when the new Game of Thrones prequel series will begin production, that information remains unclear at this time.
Unfortunately, we will have to wait, because this particular series won't air until 2020 at the earliest.
He recently told Deadline: "I do have thousands of pages of fake history of everything that led up to Game of Thrones".
Image HBO has confirmed the first of five Game of Thrones spin-offs is being piloted
"What do you know about fear?"
EW is now reporting that HBO has greenlit the follow-up to the series...so what's it going to be? During the Long Night, the Children of the Forest and the First Men united with the Night's Watch to push back the Night King and the Whitewalkers to the far reaches of The Lands of Always Winter.
Setting it thousands of years in the past is also a smart move. One by one his friends died, and his horse, and finally even his dog, and his sword froze so hard the blade snapped when he tried to use it. It would be amusing if the same blue dude just chills in the background of all of the prequel shows like "soon".
The first Game of Thrones prequel is in the works at HBO. The potential show comes from George R.R. Martin and Jane Goldman and is set to be a prequel. She is now writing the live-action adaptation of Disney's The Little Mermaid.
The "horrifying secrets of Westeros's history" is enough to sell just about every fan of Game of Thrones.
It's not clear at this point what might happen to the four other prequel projects HBO has in development, if indeed anything happens with them at all.
Cavaliers' Kevin Love expects to be mentioned in trade rumors
We still have to improve and get better, which we will. "That's probably the longest shot of it happening", Sherman said of Miami. But it appears James went so far as to wear a soft cast between games and had two MRI's, according to ESPN's Brian Windhorst.