So, there are two (potentially massive) spoilery clues hanging out there that I haven't seen yet discussed at this board. Lets dig into these, figure out what they might mean!
1. We know the opening credits for S8 have changed, but have we really zeroed in on those changes? For example, the Isle of Faces, north of KL, is now on the credits, BUT it is no longer an island! It is shown now as a peninsula, with a spit of land adjoining it to the mainland. WHY?? My guess is that it makes it easier for NK and his dead army to cross onto the 'isle'. Why would they want to? Perhaps to destroy all the weirwood trees there? Perhaps after all, NK's sole purpose, his sole ambition for everything he's doing is to destroy all the weirwoods left in Westeros? We'll know better after Ep. 3--if he makes it appoint to deliberately destroy the weirwood at Winterfell, we know that's what he's after. Could it be that the magic the Children of the Forest used to create him is kept intact only through the weirwoods, and if they're all destroyed, he'll be free to just die as a normal 8,000 year old human man?
2. At the opening of Ep 8.01, the little boy running to see the arrival of Dany, Jon and their armies has a brown leather satchel slung on his shoulder, of the type that looks like it would be used to carry documents. In 8.02, one of the two little girls who get up and walk away from Missendei has a similar brown leather satchel slung on her shoulder. AND, the little burned girl who spoke with Davos and then said she would go and guard the crypts during the battle had the same brown leather satchel. So, Varys' little birds? Qyburn's sparrows? We did hear Cersei tell Qyburn earlier (cant remember which episode) to expand his spy ring everywhere).