Something I've been wondering about recently. A lot of the big questions in the books, or some or the events that only get revealed much later on, will be revealed very differently in the TV series. We already had this to an extent when Arya saw Illyrio and Varys in the cellars of the Red Keep, suspicion for the reader becomes certainty for the viewer.
Potentially, I think we could even see HBO having to call things ahead of them being resolved in the book.
Arstan Whitebeard - ok a reasonable number of people guessed who he was. But when he turns up looking like Ian McElhinney, everyone's going to twig (or at least think "hmm, he looks familiar," and find him on IMDB.)
Jane Westerling - is the girl Jamie sees, who the Lannisters have in custody really her? for now, we have only a series of references to the size of her hips to base our supicions on. When it's the same/a completely different actress, we'll know for sure.
Coldhands - Ben Stark? or someone else entirely, all will be revealed when Jospeh Mawle turns up (or doesn't)
'The minstrell' who turns up at winterfell in Dance will also be very recognisable.
can anyone think of any others?
what do we think the chances are of GRRM wrapping up the novels in time for us to find out on his pages, rather than on-screen?