you people seem to forget that they have only 3 seasons (5, 6, and 7) to completely finish the entire SONG OF ICE AND FIRE. That thing which is only 5 of 7 books complete (oh wait, now it's probably going to be 8, says the guy who is still no further writing book 6 than he was 3 years ago)
Shit is going to get cut. Yeah, huge book spoiler!!!! shit that gets cut, is grrm fluff that doesn't mean shit in the long run, hence it's cut. Faegon, the cool ironborn, arianne, etc all mean jack shit to the actual story GRRM started off with in Game of Thrones. It's all ancillary fluff cus george decided to go off and go robert jordan on us (who went and turned a 5 book series into what, 15 goddamn books, 10 of which are bullshit meaningless fluff. and oh yeah, he went and died on us before finishing the last 3 books).
Luckily george already signed a deal with HBO to actually finish this story right around the time the 4th book was coming out so we will actually get to see the end of this story. The specific details about characters may be different, and the books certainly have a ton more side stories/plots which we now know to be ultimately meaningless anyway, because George already told D&D how the story ends for every character that matters. Also George has already decreed nobody is allowed to finish his novels if he dies before he finishes it, meaning you probably will never get to read the ending, and if you do, at the pace he writes it will be a decade after HBO spoils it for you anyway.
edit: Here's a book spoiler for you guys:
No. Hear me, Daenerys Targaryen. The glass candles are burning.
Soon comes the pale mare, and after her the others. Kraken and dark flame, lion and griffin, the sun's son and the mummer's dragon. Trust none of them. Remember the Undying. Beware the perfumed seneschal."
Quaithe to the golden child heroine Dany, thus like all other prophecies she gives it's pure truth. tear down all the anti-tropes and shock value from asoiaf and it's pretty much the same story as every other fantasy story. There are a handful of characters that matter, jon snow, bran, dany, etc. Dany is the heroine she is going to win. Quaithe appears as her deus ex machina and fixes shit the same way that gandalf does in LOTR.
That quote translated into english reads as such:
Yo girl, magic is back. There's going to be the bloody flux hitting Mereen, not that you should really give a shit about mereen anyway. Here's a list of people you are going to meet, some are going to show up, some you will meet later: some Iron born (Vic and Euron), Moqorro (Rhllor's peeps), Tyrion Lannister, Jon Connington (the whole golden company included), Quentyn Martell (and the whole of dorne really), oh and a fake targ heir. It's your boy's Illyrio's puppet. None of them are important, don't trust any of them. You know what, just go ahead and feed them to your dragons, they're only here to stretch 5 books into 8. Oh and did I mention that the shavepate you trust as councillor is mereen's version of petyr baelish? Oh you don't know who he is? when you meet him, don't trust him either. I think i said fuck mereen already, right? Yeah fuck mereen. aight i'm outtie, lemme know when you get stuck again so I can magically appear to you and tell you what to do next. peace girl.