I disagree. GoT was one of the greatest television series ever (even if the finale wasn't great). It was the perfect vehicle for today's modern large screen HDTV home theater system.
Sucks they're going to screw this one up. Oh well. At least it should have some good visuals and hopefully, world-building. But it won't be GoT. Not by a long shot.
This prequel has the 11th Doctor’s actor (Doctor Who) Matt Smith as the semi villain and I expect him to more or less carry the show.
Then when they realize he is doing it, they will write him out.
The better GoT prequel is the one that didn’t get picked up about The First Men and The Age of Heroes. Most of really interesting story threads were there.