Season two VFX details arise from Dragon Days panel 

Werner Fuchs (German agent and friend of GRRM) confirmed that GRRM told David and Dan what was going to happen in the अगला two पुस्तकें in case that he shouldn’t be able to finish the books.
कीवर्ड्स: गेम ऑफ थ्रोन्स, vfx, ड्रॅगन्स, shadow baby, juri stanossek, pixomondo, tom wlaschiha, dragon days