If Rhaegar really did get an annulment with his wife Elia, and remarried in Dorne, then this means that he and Lyanna were actually married. Therefore, this means that Jon is Rhaegar's legitimate son, and officially the next in line in the Targaryen succession. That's going to be awkward when Bran, Gilly and Sam help put the pieces together, huh?
Plus, the fact that Drogon allowed Jon to pet him implies that it's the Targaryen blood in him that he's fond of. And does that also confirm the theory that Tyrion is also a secret Targaryen, after he was also permitted a petting?
4. Is Bran going rogue, too?GIF © HBO
Was it just us, or was that totally a dick move by Bran to just send off a load of ravens telling everyone in Westeros about the White Walker situation?
Sure, Jon needs all the help he can get, but maybe run it past him or Sansa first?
Plus, the Night King clearly has a personal connection with Bran now ever since he touched him in an earlier vision. They're coming directly for them and it's all his fault. Bran needs to prove his worth soon and stop being such a bloody liability.
5. Littlefinger is back to his scheming ways© HBOAdvertisement - Continue Reading Below
What better way to gain power than to get everyone else turning against each other? He's done it before, of course.
He's aware that Arya is already on to him, and he's finding a way to put her and her sister at war. Sansa and Arya never quite saw eye to eye, and Arya is already uneasy about Sansa's clear yet secret desire to dethrone Jon. And she'll probably get her wish when everyone realises he's actually a Targaryen.
Winterfell's Maester Luwin kept very single raven scroll ever sent from King's Landing, and Littlefinger had a jolly good rummage around, finding the letter Sansa wrote under duress back in season 1. Littlefinger was in the room when Cersei forced her to do it, so he knows exactly what it means and where it came from.
The letter reads:
"Robb, I write to you with a heavy heart. Our good king Robert is dead, killed from wounds he took in a boar hunt. Father has been charged with treason. He conspired with Robert's brothers against my beloved Joffrey and tried to steal his throne. The Lannisters are treating me very well and provide me with every comfort. I beg you: come to King's Landing, swear fealty to King Joffrey and prevent any strife between the great houses of Lannister and Stark."
Although the letter had the opposite reaction from Robb (after Maester Luwin quickly deduced that it was Cersei's words, not Sansa's), will Arya come to the same conclusion?
Littlefinger is purposely leading Arya down a path to stop any bond between her and Sansa, so he can have Sansa for himself. He's hoping that if Sansa remains wary of Arya's dangerous ways, that she'll turn against her sister, and therefore, family, again.
6. So, they're just going to capture a White Walker?© HBO
It appears that the only way to try and convince Cersei and Daenerys to stop squabbling for five damn minutes and help join Jon and the rest in fighting the White Walkers is to simply show them one.
And to do this, they need to go and capture one. How the hell are they going to do that? Tie him up and take him there by boat?
We like the idea that said wight will become a named character in their own right. Maybe it'll be Karsi, the former Wildling who was turned into a White Walker after the Battle of Hardhome?
7. Will Cersei actually agree to meet with Tyrion?
Let's just say that Jon and the gang are able to capture an actual White Walker. Will Cersei just casually allow him, her enemy brother Tyrion and a zombie thing to enter King's Landing and have some tea?
And even if they present her with a wight, will that be enough to convince her to join them in battling the army of the undead? She tells Jaime this week that they will "defeat anything that comes against them", and surely that means Jon, too.
Source : http://www.digitalspy.com/tv/game-of-thrones/feature/a835538/game-of-thrones-season-7-episode-5-theories-questions-eastwatch/