Thronebreaker was originally going to launch along side the big Homecoming update when it launches about October.
Basically, Thronebreaker will be a single player RPG with cards, similar to Gwent, but its own thing. Best of all, perhaps, it’ll have roughly 30 hours of gameplay. Worst of all, if you were hoping for a free-to-play experience, is that it won’t be.
All this come from an intrepid Reddit user by the name of Apero_, so read his post for the full detail.