Three of the six released teaser chapters or summaries of chapters he's read at various cons were originally included in ADwD and were taken out for space constraints and to leave the Mereen story as a cliffhanger. I think the two involving Dorne and the one in the North were completely new. I'm not sure though. It's a very slow process due to so many overlapping storylines.
5/16/13 at 8:48am