I wonder if Dany is going to decide to throw in with Jon and fight the white walkers, leaving Cersei to think she has won......right up until Arya assassinates her?
I think that they're either going to play out the Dany vs. Targaryen war and then deal with the white walkers, or try to unite the kingdom against the white walkers leaving Cersei in charge of her armies. If they do the latter, I think a good plot turn would be for Cersei to betray everyone in the hope that the white walkers will kill off her enemies, and for Jamie to kill her for it after finally realizing how crazy she is.
Cersei has gotten a lot smarter since her first attempt at power behind the throne with Jofffrey.
She figured out Castily Rock would be a target, and the Tyrells would be pretty much defenseless without Tarly to back them up.
I'm sure that was Jamie's thinking, not hers.
Maybe, but she has definitely gotten smarter the past few seasons, not book smart, but cunning smart.
Usually Cersei is good idea, bad idea bad idea terrible idea ok idea, bad idea.
So far its been a string of good ideas, very evil good ideas, but good ideas.