David Benioff and Dan Weiss are plotting their departure from HBO, their home for a decade.
They are inching closer to a new overall deal elsewhere as they continue to take meetings.
They have had meetings for a sizable overall deal with Amazon Studios, Netflix and Disney/FX.
Benioff and Weiss are seeking a deal worth as much as $200 million.
A new overall deal outside HBO would wipe 'Confederate' off HBO's books.
HBO did not want to compete to keep them given the size of the deal and their commitment to Star Wars.
The two will be credited as exec producers on any and all Game of Thrones prequel series.