I will be completely shocked if the Crypt is not full of undead, slaughtering the living who are sheltering there.
The writers have all the subtlety of a sledgehammer, since they no longer have GRR Martin's material to draw from. They couldn't have been less subtle about it, given the number of times we were told that the women & children were going to be sheltering in the crypt, and that the crypt was safe. Then there's the spoilers in the trailers, with Arya running through the crypt and Jon saying that the dead were "already here".
The chances of the crypt becoming a slaughterhouse are 100%.
The writers have all the subtlety of a sledgehammer, since they no longer have GRR Martin's material to draw from. They couldn't have been less subtle about it, given the number of times we were told that the women & children were going to be sheltering in the crypt, and that the crypt was safe. Then there's the spoilers in the trailers, with Arya running through the crypt and Jon saying that the dead were "already here".
The chances of the crypt becoming a slaughterhouse are 100%.
As for next weeks trailer I don't think Ayra is in the crypt and if she is I find it more believable that she would be using the hidden passages to get to Bran or someone. Her character isn't one to be scared and although it makes it out that she is running away from something I think she will actually be running towards the danger, which would be more fitting towards her character. Also its Danny who says 'the dead are already here', Jon says "the Night King is coming" which is simply stating the obvious. We know the dead are here and are about to attack Winterfell, we don't yet know how the Knight King arrives but I don't think there will be some big twist.

