This scene reminded me of when Dalinar almost released Odium from his bonds. Just the part where Odium turns his head around and explains what Dalinar is about to do.
Hmmm,one thought,could this be Odium? And him ascending to Herald status would just be him becoming his Champion? And Gavilar almost saying the words were like,Gavilar giving in to Odium? Meh,long stretch. was fun while it lasted