Felt that this got a little lost in the bigger "new background" thread, and figured some of you might find this interesting or at least amusing. So, copy paste from my earlier post, and here goes:
I don't know if this has been mentioned in the discussion already, and it might be a bit of a weak argument, but I think that there might be some lost legion love in one of the pictures in the book.
Check out the picture (p. 166) where the Emperor is adressing... Who? Luna Wolves and Emperor's Children are obvious, but to his right beyond the Emperor's Children there's a banner with the visible number 2 and some kind of dragon/snake device. I might be wrong, but this to me feels a lot like coinciding with the second (lost) Legion. Not at least because the number is _just_ visible.