Board Thread:General Discussion/@comment-3035448-20160727005157/@comment-27542229-20160727022522

I feel like the show is foreshadowing Tyrion doing something about the killing of his niece since Oberyn was trying to avenge the killing of his niece when championing Tyrion. I think it is too neat of parallel to leave it as just a coincidence.

Plus, as Tyrion previously said, he really liked Tommen and Myrcella. But before anything happens, Tyrion is going to have to learn that Ellaria killed Myrcella. Who would tell him? Jaime - seems doubtful. Maybe Varys will learn of it during his time in Dorne but since Varys' ultimate goal is to put Daenerys on the Iron Throne, he probably wouldn't tell Tyrion for fear of causing a rift in the alliance. Ollena as some sort of power play since the Tyrells and Dornenishmen are still wary of each other after fighting against each other for centuries.

Anyway, my point being, Tyrion has to learn of Myrcella's death first before he does anything about it and I think it will be unlikely for him to find out about it until much later.