The bad news is that review of the manuscript by the editorial board has been put off until April, since they weren't able to have an in-person meeting until February. At this point, there's very little reason to fear that the book will be rejected, but the board will be hammering out some of the details of launching the series so that there will be uniformity in cover design, layout, and so on. Back to the business of learning patience, I suppose.
As for the Firebird concept, I continue to hammer away on it a little bit at a time in between other things. I intend to keep pressing on with it as I have had a lifelong ambition of publishing a fantasy novel that has yet to be fulfilled, but I am certainly far, far away from having a finished product.