Did you guys hear Kotal Kahn's audio closely? It sounded a little like "Quetza-Kotal Khan." And Quetzacoatl the Aztec god was a huge feathered dragon...maybe Kotal Kahn won't be a big push-over. I'm probably going alright speculative, but it could mean that Onaga might have another potential host to resurrect himself through
Here's where I got my source from:
http://www.deviantart.com/journal/Victor-s-Statement-A-Giant-Revelation-483109144