Now that I'm over my initial screaming and have watched the teaser approximately 167 times, let's break it down.
First things first, in case it's not already obvious: this isn't actual footage from Season 8, but rather a scene shot specifically for the teaser (you might remember the super cool one featuring Dany, Jon and Cersei from Season 7).
This time, the teaser focuses on Jon, Sansa and Arya in the crypts at Winterfell – suggesting that, unsurprisingly, House Stark is a major focus of Season 8.
AND YES I AM SCREAMING THAT JON AND ARYA ARE ACTUALLY ON SCREEN TOGETHER FOR THE FIRST TIME SINCE SEASON 1.
I also screamed when Jon walked past the statue of his mother, Lyanna, as we heard her plea to Ned: "you have to protect him".
We also saw the feather in Lyanna's hand flutter to the ground.
We saw the feather again in Season 5, Episode 4, when Sansa visits the crypts with Littlefinger.
Basically, the feather is very tied up with the story of Jon's parents, and also Ned's need to protect him. The fact it's now falling to the floor, with Jon looking over his shoulder towards it, indicates the truth is finally going to drop, and Jon will learn who he really is from Bran and/or Sam.
She glances briefly at Catelyn's statue, emphasising her ties to her mother and her role as Lady of Winterfell.
It's interesting that the voiceover we hear from Catelyn in this moment is not, however, about Sansa. It's about Jon, once again reinforcing the importance of him and his parentage: "All of this horror that’s come to my family, it’s all because I couldn’t love a motherless child."
The teaser then cuts to Arya Stark, and unlike Jon and Sansa, we get no personal moment between her and any of the statues of her family members, suggesting her time as "no one" is still very much a part of her.
It's Jon who gets another moment with a family member. This time, he pauses at Ned's statue, as we hear Ned's words to him from Season 1, Episode 2: "You are a Stark. You might not have my name, but you have my blood."
Once again this suggests Jon learning the truth – and dealing with it – will play a big part in Season 8, but also hints that ultimately he will always embrace his Stark blood, and Ned as his father.
Then we see Jon, Sansa and Arya uniting at last – which has me VERY EXCITED.
THEY ALL SEE STATUES OF THEMSELVES!!
Then, of course, a frost descends, extinguishing Jon's torch (eek) and freezing Lyanna's feather.
We then get this goosebump-worthy shot of Arya and Jon simultaneously pulling out their swords, preparing for the inevitable Battle for Winterfell.
Will it all end in the crypts? One thing's for sure: the Stark siblings aren't going down without a fight.