Hold your dragons, Game of Thrones fans, another prequel of the hugely popular fantasy series is eyeing a green light. HBO is close to giving a pilot order to a GoT prequel from author and GoT co-executive producer George R.R. Martin and Colony co-creator/exec producer Ryan Condal, which is set 300 years before the events in Game of Thrones and tracks the beginning of the end for House Targaryen.
