I thought Spock just went somewhere in After Darkness? I wonder if that period will be explored, or dare I say it he returns to the Prime Universe?
Just do to a bit of extra-continuity trolling:

In a STO episode set in 2409, Empress Sela listens to a recording of Spock. It begins with: "21 years ago, the star in the Hobus system went supernova, sending a wave of devastation across the quadrant..."
The "recording" is actually the game intro. Btw, there is a memorial for Spock on New Romulus and Vulcan each. The one in Mol'Rihan is pretty cool - it combines the Romulan raptor's wings with the IDIC.