I understand the knee jerk reaction with GOT in hindsight, but I doubt they would extend much beyond the game’s end. I think it’s more about filling out the story with more of the world.

If you think about where this season has gone and where the focus has been, you might infer how season three will be written, and where that might end under the assumption there is a fourth season. We just don’t know yet.

Also there seems to be a lot of factions stuff being set up that might fill out 3 & 4.