Bruno Heller, who helped create Rome, The Mentalist and Gotham, is behind one of the spinoffs, titled 9 Voyages or Sea Snake. Of the three, 9 Voyages appears to be the most fully formed, according to Deadline. Flea Bottom and 10,000 Ships are the other two, both of which have no writers attached. "The 9 Voyages series refers to the great voyages at sea made by Corlys Velaryon aboard the Sea Snake ship," according to Deadline. Flea Bottom is set at the poorest slum district in King’s Landing, as shown in Game of Thrones. 10,000 Ships is "a reference to the journey made by warrior queen Princess Nymeria and the surviving members of the Rhoynars, who travelled from Essos to Dorne following their defeat by the Valyrian Freehold in the Second Spice War." They are the latest Game of Thrones spinoff series in the works that includes House of the Dragon and an animated series.