I thought for sure were going to see hints at zombie dragons or something when Cersei and her ex-maester dude were talking about how to deal with Dany's pets.
Eh. I've never been impressed by him. Neither the actor nor the character. Especially when there's someone like Varys to compare him to. Now, with that interaction between him and Jon, it seems like they're just setting up the obvious "you didn't pay me the proper respect so I'm going to fuck you over like I always do to my enemies...oh, and I'm going to bang your sister, too."