No one except FFG knows what the next CP expansion will be. I remember a while back voting at a tournament if players wanted more support for Holy, War, Noble, or Learned crest support. Nearly everyone I spoke with that voted, voted for Learned crest. I don't know if Learned got the most votes, but considering Balerion and the Minstrel plot was printed, I'm guessing that FFG will deliver on whatever the community voted for. I don't know if the next expansion will be crest-based, but as some point one probably will be and my guess is that it will be focused on the Learned crest.
Just to be sure: this presumably recent vote was cast post-Noble crest vote from 2 years back, right?
Since War, Noble and Holy crests got their time in the limelight, I'd like to see more of Learned...and maybe even some non-neutral Shadow crests for non-Lannies.
With a card like Ill Tidings, we may already be seeing some early signs of Learned crest support .