Game Of Thrones Prequel Series: 10 Things It Must Include
7. The Night King
Few characters from Game of Thrones can appear in the spin-off, which is actually something to be excited about as it gives the new series a lot more freedom. Leaf could turn up, but beyond that no one else should be appearing - except for the Night King.
The leader of the White Walkers, almost nothing is known about how long he's lived, but there was a crucial reveal in Season 6, which showed the Children turning a man into a White Walker. A man who just so happened to be played by the same actor as the Night King (Vladimir Furdik).
Given how Thrones casts so many extras, it's unlikely that's just a coincidence, and the prequel is going to show us the origins of the White Walkers. That means we really should be seeing the Night King once again, and learning much more about who he was before that.