Oh. Well my theory basically is that AA wife wasn’t alive when he killed her she was dead and controlled by the Others. And that AA was the first to make the swords and arrows of dragon glass in a strong form that kills the re animations and the Others without shattering like steel swords but with dragon glass. Which saved the world by pushing back the Others. And John and Sam are going to do the same . But not in enough time to save Dany and a lot of other people and Jon will have to kill reanimated Dany that is being used by the knights king to take King’s landing.

Also that Jon will raise a dragon from the crypts of Winterfell after Winterfell is destroyed. And that it will be the only dragon left alive after the fighting. Since my guess is all of Danny’s dragons will die with her. And that to make dragon glass swords invokes dragon flame and Jon will use this dragon to create the weapons to take down the Others . - this is the more fantastical theory based of the crypts mentions and Jon and his feelings about the crypts and part of the prophecy that predicts he turns stone into dragons.