The New Game of Thrones Trailer Has Sparked So Many Wild Theories

"When the snows falls and the white winds blow," Sansa says, "the lone wolf dies, but the pack survives." There have been so many lone wolves throughout the series. The most obvious guess is Jon Snow, but is that too obvious? Would they really kill Jon Snow again? Some more adventurous guesses include Cersei (who, at this point, is ruling King's Landing by herself), Daenerys (who has always been a solitary ruler), or even Arya Stark (who has been on her own for quite a few seasons now). But would any of them make sense? Sansa seems to be implying that one person might sacrifice themselves to save everyone else. We can only guess.