Dorne: The Martells
Here’s a big deviation: Ellaria and Tyene Sand kill Doran Martell and his bodyguard Areo Hotah while Obara and Nymeria kill Doran’s son Trystane. In the books, Doran is secretly working to return the Targaryens to the Iron Throne. There’s also a secret Targaryen who’s been cut from the show because that’s just how stupid he is. So you can see this plot’s been cut to shreds. Now that Ellaria has performed her surprise coup (nobody seemed too pissed about Doran’s assassination) and Trystane and Myrcella are dead, Dorne is set to make war on the Iron Throne for certain.