Daenerys Targaryen, Stormborn, the Unburnt, Khaleesi of the great grass sea, breaker of shackles, mother of dragons, queen of Meereen, queen of the Andals, and the Rhoynar, and the First Men, Lord of the Seven Kingdoms, and Protector of the realm.
There is so much to say about Daenerys. She's the rightful heir to a kingdom she's never seen, she disrupts the lynch pin of her worlds slave trade, she's a widow, she's 17, she loves her dragons, she has to lock them in a pit.
full disclosure before I go into headcannons that inspired this, I have not finished A Dance with Dragons. I'm about halfway through, and have finished the show.
Martin has spent so much of the books, and in particular Daenerys' sections, building out the details of this massive world, much of which was ruled by the Valyrian empire. I don't think that Daenerys will abandon her seat in Meereen for Westeros, or her Khalasar. She is the Stalion who Will Mount the World. The central head of a new Valyrian empire.
I'm sure that after she stabilizes slavers bay, she'll make her way to Westeros, and she might have some conflict with her nephew Aegon, but if Rhaegar was right, and the dragon needs three heads, than Aegon, Jon, and Daenerys will have to come together to fight off the long night.
Once I've finished a Dance with Dragons, I'll probably come back with all three surviving Targaryens to talk about the Prince that was Promised.