As of the end of ADwD, I’m beginning to think it’s the mare (Dany) who will “unite the Dothraki into a single khalasar” and all that.
Viserys’ end is one of the series’ great scenes. Daenerys, like Sansa, goes “cold” and “curiously distant,” but here it feels like an appropriate response to the situation. Maybe because, unlike those whose deaths Sansa dismisses from her consciousness, Viserys is known to have brought his fate upon himself. (And Daenerys will never remember this as the most magical time of her life, or silver-lining philosophize that now she can find someone handsomer to hang out with.)