The five Game of Thrones prequel spinoffs currently in development at HBO will not feature any existing characters, HBO president Casey Bloys confirms to TVLine.
We want the final season of Game of Thrones, being the special event that it is [to stand on its own].
“Should we go forward and make a pilot and [then] a series, nothing would air on HBO until at least a year after Game of Thrones ends.
However, the exec is quick to add that “there may be [familiar] bloodlines” in the potential series.