Aegon wont win, he will be a fake - a Blackfyre planted by Varys & Illyrio.
Really think GRRM will write all of the Dany chapters from book 1, for her to then get defeated by a new character brought in at the 5th book with limited chapter time?
I really hope Dany doesn't "win" the iron throne too though. Don't like her, or her chapters.
Plus I think Strong Belwas can still appear, he can come in as a gladiator of Meeren and represent a bunch of other minor characters.
I don't think anyone can guess what will happen as there as so many possibilities and people vying for that throne.
So many plots going on, it's great. From Dorne to the Wall and beyond, the story is fantastic.