So the final covers for 29 and 23 have been revealed. I unfortunately have little time for this post... So you can see the covers on The Voice of Odyssey.
The other really exciting piece of info I have is this which I also saw on VoO. Though it's an excerpt from aiowiki's future page.
"This album will have two three part episodes.One of the 3 parters is called "The Labyrinth." Refer to the first part of the summary. This episode will feature an Agent Billings. The other 3 parter is called "Sgt. York." Refer to the second part of the summary.This was originally a 3 part episode. However, after editing the
voice tracks, the AIO team discovered that the episode is 18 minutes
too long. Rather than cut out 18 minutes out of the story, they decided
to make it into AIO's first 4 part episode. Because of this, an episode
from album 55 will be pushed back to be released in a future album. "
Odyssey's first four part episode! I think it'll be great. I really can't wait for 55!..!