My prediction:
Verily, Obsidian will releaseth something uexpected for the finale. Maybe another screenshot with character avatars of much awe. Mayhap a tiny mock-up-ette of projected gameplay.
This will resulteth in a nerdgasm tremedous (and the heavens shall tremble), resulting in a last minute mountain of treasure!
I am a sage with powers unusual. I felt this in my water when I took my ablutions this morning.
So it has been spoken, so it shall be.
(Excerpt from the Montecromicon, the holy text of Grognards)