I am actually intrigued to see how divergent the source and the series become. Of course, that is dependent on Martin finishing the books. Pratchett finished the Discworld series, 70 books in his 60 years. Of course it wasn't from birth, so that's a book or two every year. Martin goes decades between releases of a single book. Don't know what excuse he could offer for such tardiness. I still maintain he will quit the series.
I think Stannis will come out on top, maybe. Daeny has Dragons, but Wargs can control beasts. Interesting conundrum.