Board Thread:General Discussion/@comment-32710756-20170803001216/@comment-27542229-20170803001811

There are five more Sand Snakes than shown in the show - they have just been referenced in dialogue.

House Frey is not extinct - all the Frey women are still alive. Plus, Arya did not kill any children so there could still be AFrey boys alive.

Anyway, more than likely, the show is just going to gloss over who is ruling these lands. Seems like the writers are just setting up the show down between Lannister / Euron, Targaryen, Stark and White Walkers.