I've gotta echo Pike here. I'm not a fan of Dany, but it's hers. I know that the whole point of usurping a throne is that it no longer belongs to the people who had it before, but it's hers. DRAGONS.
Plus, I mean, if we're going with the next true heir of Baratheons, we'd have Stannis. Do we want Stannis? No, smurf Stannis.