Novellas first—and that’s probably a good rule going forward, if/when there’s a situation like this again, fiction and a related sourcebook releasing at about the same time.
Management has said many times that they want “fiction to drive the universe again.” What that means to the rest of us is that you may find more enjoyment in experiencing events “as they happen,” viscerally and through the eyes of the characters living them, and then consult the sourcebook to see how it all fits into the bigger picture.
This is a flip from recent years, where sourcebooks were the main—and really, only—momentum forward. For all the good work BattleCorps produced, in many cases the authors were doing the reverse of what I just described: taking a few paragraphs or even less than that from a sourcebook, and expanding it into a fiction story. No shade, I did that with “Permanent Losses.” But these novellas work differently.