- I think that predicting the future is not of Odium, it's of Cultivation. We know Cultivation is very good at seeing the future, and I think she's also very good at granting other people the ability to see or predict the future. I think all elements (besides Moelach, of course) that have to do with prediction are her doing. Renarin, the Diagram, the nightforms mentioned in the listener songs (I think they'll show up in present day too).
- Cultivation tasked Sja-anat with corrupting Glys and bonding him with Renarin.
- The Diagram was Cultivation's attempt at helping humanity against Odium, but Taravangian has messed it up by editing it with the Death Rattles. Odium is manipulating Taravangian through Moelach, giving him glimpses of the past or future without context and causing him to turn the plan in Odium's favor.
- Navani and her scholars won't be able to return the Sibling, so they'll be forced to find another way to make Urithiru work. Maybe by creating a 'robot spren' like Nightblood, but one that works properly. Maybe Zahel will help them out, and we'll learn more about the creation of Nightblood.
- Venli will become Dalinar's champion. Since the signers were originally of Honor, it seems fitting. Though, whoever it is, it will not be Kaladin, that's too obvious. On that note, Moash will not be Odium's champion. Again, too obvious..
- Tezim will become an antagonist and will be killed by the end of the book.
- Dai-gonarthis was on Aimia, but the expedition there (that will happen in 'Dawnshard') unknowingly brought him back to the main continent.
- Zahel will reveal to Hoid how he left Nalthis and that'll help Hoid can figure out how to worldhop with his spren.