I have two pie-in-the-sky predictions for it.
1. Pat Rothfuss shows up out of nowhere and announced he's done with book 3 of Kingkiller.
2. The Unannounced Universes Beyond MTG set for next winter is a Cosmere set. They announce it at the Welcome Ceremony/Release Party, and show off the cards and mechanics at the *REDACTED* panel.
Not sure which is more likely of the two...