That's a good one. The one I picked up had to do with Varys and Tyrion. I think he was being honest. Melisandre's magic is indeed very dark, and we know that Varys' loyalties are to the Targaryen family. I think that we got a hint on that front: What is he getting at? Perhaps it's just having discovered Varys' loyalties in ADWD, but it definitely hit me as a hint in that direction, since we know Aerys had a thing for Tyrion's mother, and there are other hints as well that Tyrion might have Targaryen blood. I looked in the books to see if that scene was there, and found this instead: Was Varys trying to hint that Tyrion's father was dead? Since GRRM wrote the episode, I really have to wonder about that. I was hoping for a hint about Jon soon, but got one about Tyrion instead. Yes, that's very strongly implied in the books. And in the show, too, so far.
