I hope Dany doesn't go mad queen, my thoughts are as an audience, we've invested too much in her character for it all to go wrong at this point. Varys is definitely going to be incinerated dragon style for treason, he's hinted in the past that would be his fate. Also think Jamie could be going to kill Cersei, she will only be killed by someone who can get close enough to her, at the moment, the only people who could do that are the Mountain, Jamie, Euron, possibly Tyrion and Qyburn, so if its Arya to do the deed, she would have to be disguised as one of those people. Loose ends to tie up, what about Daario? I had a thought this morning, that after Emilia Clarke saying episode 5 was her favourite, what if Daario and the second sons have infiltrated the Golden Company and attack Kings Landing from within. Another theory I've read, there are more dragons. Drogon dissappeared for quite a while, where was he/she during that time?, we assume dragons are male etc but no-one knows for sure. Fan theory is Drogon has baby dragons.
On Thronecast they talked about no-one ever listens to Sansa, she can't fight but she is an excellent politician and strategist, the way they finally corned Littlefinger was down to her. She will survive I'm sure and be in it till the end, Arya, I'm now thinking either she will survive, but then dissappear, or we'll never know if she's dead or alive at the end.