High Sparrow. The High Sparrow is the leader of a powerful religious group who should become influential in King’s Landing. If all goes according to the books, the High Sparrow (no one knows his real name) will serve as an adversary to Cersei Lannister, and that’s something everyone can get excited about!
Doran Martell. The patriarch of the Martell family and the Prince of Dorne, Doran is quite a bit different than his rascally little brother Oberyn. That’s not necessarily a bad thing, as Doran is more calculated. Think of him as the Dornish version of Tywin Lannister.
Trystane Martell. Trystane is Doran’s son and, in a change from the books, the heir to Dorne. He’s also betrothed to Myrcella Baratheon, so the two of them could possibly have a Capulets and Montagues story going on in Season 5.
The Sand Snakes. Three of Oberyn’s bastard daughters have been cast, but we don’t really know how different they’ll be from one another so we’re lumping them all together. The girls are all great fighters and will be thirsty for revenge after their father’s death, so expect them to stir up a lot of trouble in Season 5.
Areo Hotah. Hotah is a beast, and though he doesn’t say much in the books and probably won’t in the show either, he lets his giant battle axe do the talking.