It seems clear to me that Odium and Honor will merge. Odium is said to be God's own divine hatred without context. Honor would provide this context and restraint.
Fairly sure Cultivation will willingly give her shard to this mix, resulting in the triple shard Unity. Dalinar will Ascend to hold this, because he is the one person who has Connected to all three of those shards.
Hoid will probably lead an effort to reunite Adonalsium with the support of Dalinar and Sazed. The new antagonist will be Autonomy, who opposes this due to his Intent.
I believe Autonomy is behind Vun Makak and Nu Ralik on Roshar, the Pantheon on First of the Sun, Dayside/Nightside on Taldain, Austere on Nalthis, and the Trellagists on Scadrial. Perhaps others.
Stuff will happen....
Space odyssey from Scadrial to reach a shard who has hidden on a planet with no perpendicularity, and perhaps ending with Hoid holding the last peice of Adonalsium all this time, but never having taken it up.
Dalinar gets to meet his God Beyond, who says something about this all being planned, happy ending, fade to black.