I heard from another player that it's never specified who really is going to be the slayer of Kralk, or how Kralk even will get killed. That brought me back to Palawa Joko's last speech to the Commander where he says "that I may save this world, from you," (Commander). I have a small gut feeling that Joko was really predicting the future, and that he wasn't bluffing to the Commander at all. There is a small chance that Aurene eating Joko, then being branded, will cause the Commander to eventually unbrand Aurene, but accidently release Joko in a spectral or physical form. Joko then somehow would challenge Kralk killing or nearly killing him, therefore making Joko's words from his speech become true. If this does happen some people such as the Awakened and more might choose to hail Joko as a hero, and lose faith in the Commander, the Pact, and Dragon's Watch. What would happen next is anyone's guess. I know this is a longshot guess, but you never know.