I think Jaime is going to kill Cersei
Jaime killed the mad king because the mad King was planning on blowing up kings landing. Jaime took action before people could be killed. If Jaime still holds himself to those principles and morals, Cersei could be next. As Cersei was crowned queen, the camera pans to Jaimes face. He is pissed. Cersei completely left him out of the loop and as a result his heroic act was canceled out. As Cersei was continuing on her revenge streak, she tortured the nun instead of comforting her son. Her son killed himself which was no shock. Now Jaime has tons of motives. These articles explain why even further and even explain Cersei's prophecy and how her "volanqar" plays into it.
I dont think Sansa will betray Jon. Sansa has come a long way from the naive girl in season one who thought life was a fairy tale and she still has a long way to go. When Jon was pronounced king of the north, she smiled because she was happy for him. That smile faded as she looked at Petyr Baelish because she knows he is up to something.
I think Sansa never telling Jon about Petyr Baelish's army was a good move on her part. If Jon knew, he would've put some troops in reserve and Ramsay would've known something was up and probably would've done the same. Also it makes Petyr think he is dominant over Sansa. I agree with Sansa. Petyr Baelish is definitely up to something. I think he is going to convince Sansa to betray her brother. Sansa is getting more and more cunning. She may surprise us and make everyone, including Petyr Baelish think she betrayed her brother when really, she had a hidden plan against Petyr Baelish. Sansa even said it herself. "Only a fool would trust Littlefinger." Either way, there will definitely be a power struggle between Lord Baelish and Jon as well as, Sansa and Jon's relationship will be tested.
Also, I think Lyanna Mormont, (the little fiery lady of House Mormont who is Jon snows number one fan and who gave an entire room of men the ultimate verbal smack down and got them to rally behind Jon) will definitely have a bigger part in the coming seasons.
Who will Arya kill next? Here's who is left on her list. I don't know why I clicked, no opinions but you can leave opinions here.
Melisandre was exciled by Jon and is heading south while Arya is presumed to be heading north to Winterfell. This may be the perfect opportunity for Arya especially since Melisnadre said they will meet again.
I am hoping for a Stark family reunion but that could be wishful thinking. We never get what we want on Game of Thrones. But this is how I picture the Sister Stark reunion going. If we get one.
Arya- so how have you been Sansa?
Sansa- I married a lord
Arya- ugh again? Not much has changed I guess.
Sansa- and then I released his own dogs on him and allowed them to tear him apart.
Arya- You had your first kill? *eyes tear up out of joy*
It was a great season to be a Stark. Unless you were Rickon.
I think the wall will come down and it will be Brans fault. Most likely because he will cross the wall, messing with all the magical enchantments. Which means Jon will have to fight the White Walkers.
It may have been a good season to be a stark. But the Stark's have trouble. It's likely Cersei will seek revenge and we all know Littlefinger has something planned. Cersei already blames Sansa for the death of Joffrey, I think she will have a very violent response.
The War to end all wars is coming. This war will either unite them all or make them all perish. Either way, things are going to get crazy. Especially since this is Game of Thrones and we won't get happy endings.
Based on how quickly the plot will move, Dany will arrive in Westeros, in early season seven. Soon after that, Tyrion will meet his siblings again- in battle. We last saw Tyrion with Dany headed to Westeros wearing his new Hand of the King pin proudly. Cersei still blames Tyrion for Joffreys death and Tyrion will have to fight against them in battle for the kingdom. But I don't think Jaime supports Cersei so, Cersei might be alone on this.