I dont know if anyone noticed... but when Jaime and co are leaving Dorne, and saying goodbyes: after Doran says I wish you a safe journey home, he then looks at Ellaria and nods to her... she instantly approaches to Myrcella and kisses her. I now ask myself if it was done with Dorans consent? Then it would seem legit when in episode 9 Ellaria bend the knee... he did tell her: I dont believe in third chances. But question stays: why would he send Trystane with them if he planned to kill Myrcella? Maybe he will blame it on Ellaria and Snakes and tell to Iron Throne that 4 of them are outlaws and will be hunted down(I presume that they are leaving Dorne for some other mission that Doran gave them so it all will be convinient for him). Then Trystane will be out of harms way, especially for two reasons: Jaime gave his word to Doran that he will take Oberyns place in small council and second... boy have no clue about this plan and loved Myrcella for real. In this way, 1. he have some revenge for Elia, her childen and Oberyn and 2. his man on the place of power(what are his intentions for politics of KL we have yet to see). It may be out of character for book Doran... but when we see how they butchered other characters it can easily be truth. Personally, I can accept this outcome... everything is better then Ellaria going rouge and having no Dorans plan for revenge from books. But, knowing how simple D&D are, it is probably out of they reach to think of something like this :)
