Even though the first season just ended, Telltale has revealed a second one is already being made.
Telltale's CEO and co-founder Kevin Bruner recently told The Hollywood Reporter, “When we initially announced the series in 2013, we let everyone know this would be a multi-title, multiyear partnership with HBO. After this week's finale, I'm pleased to officially confirm that there will be a second season of Telltale's Game of Thrones series, and that it's currently in development. The questions left on the table at the conclusion of season one, who survived and who didn't, as well as all the other choices you made play a huge role in the second season. We've been planning the second season all along, but I really shouldn't be revealing more than that.”
(Source: Hollywood Reporter)