The Pack Survives

Following after the end of season 4 of the TV series:
However Tyrion escaped before his trial by combat, thus Oberyn Martell is still alive and still part of the small council. Tywin is also still alive and Arya didn’t get on the boat to Braavos.
A mysterious knight states himself a Stark, helps reunite the rest of the Stark children and also helps in the ‘rebellion’ against the Iron Throne (the Lannisters, Boltons, and Freys).