User blog comment:Fusedtwilight/Season 9 plot/@comment-3045936-20130519201622

My three possible, plots for season 9 with angels. One, Castiel as a human takes on the Heaven sealing trials as according to what was said, the angels were just cast off out heaven, never turned into humans. So logically, it stands to reason the trials would send them back, once completed. Also, there could be spell on the tablet to undo or reverse Metatron's spell.

The third possible idea, is as the demon tablet gives details on the Demonic influence on the soul's essence. The angel tablet, might give similar details for what makes up angels as supernatural race. So maybe, there is a way for Castiel to be turned back into an angel, and if he can travel to Heaven he can fight Metatron.