Casting calls for once good outlaws gone bad....The riverlands with Jaime, Pod and Brienne all seemingly there.......Lannisters and Freys all in one place ripe for the taking....and now this news.
After all this time, they couldn't possibly be swerving their own swerve, could they?
It'd be very late in the game to do it given with 13 episodes left after season 6, that the fat cutting would be in full swing. Stoneheart would just seem like an unnecessary wildcard at this stage, though it can't be denied she'd serve as a nice contrast to Jon in terms of the best and worst of what the Lord of Light can give.
Also, with the Boltons likely eviscerated by the end of this season, what better way to top Joffrey and Ramsay than having the last non white walker big bad be a Stark gone horribly wrong?