Something I've just noticed - when FFG say a product is "in Development" they are not lying... Moonboy appears in Taking the Black, and the King's Peace preview articles... It will be interesting to discover where he ends up.
Moon Boy!
To explain; he appears in the "Taking the Black" article, but in the fan introducing the "Westeros" cycle - which includes a number of cards not in the first chapter pack. You can tell what pack they'll be in by the number on the card; Winterfell Castle is 22, and therefore appears in the second pack (1-20 are the first).
The confusion here is that the article Taking the Black served as both an introduction to the cycle AND the first pack, so has cards from both.
That makes more sense, I thought it was a bit odd.
By the time that a cycle is announced, all development and design for all 6 packs is 100% done.