rise of Daenerys Targaryen

Daenerys Targaryen is born twenty years earlier and it changes everything. Begrudgingly married to her brother Prince Rhaegar at age thirteen, Daenerys not only births heirs of the Iron Throne, but dragons as well. When Rhaegar runs away with Lyanna Stark, scorning Dany and angering Houses Stark and Baratheon, House Targaryen starts to crumble and it's future rests on Daenerys' shoulders. She finds a surprising ally in the youngest member of her father's Kingsguard.
Or, who will win the War of the Usurper now that three dragons grace the battlefield?
will she win or fall.