re: Crackpot ASOIAF Theories SPOILERS

I feel as though there should be more land in the north of the east. Also, did anyone else note that GRRM mentioned at ComicCon he had to make up all these names for places in the East where the story would never go? I wonder if that settles it that Danaerys won't be passing The Shadow so to speak on her way to Westeros.