That wasn't what I prepared, though. I prepared:
Hector Valois, leader of the Dragon Nursery, seeks to conquer his neighbors in a bid to give his growing dragons dominions of their own, underneath his rule. He's a warlord used to ruling *dragons*, and thus, is a tough, hard man to negotiate with, highly charismatic, and exceedingly ruthless.
Everything that happened after the PCs -touched- that event was completely and utterly unprepared-for, beyond what I "knew" was happening because the PCs said "we're going to go do X".