Well, I was checking out some pics of Cata when I noticed these two shots of the Worgen log in/character creation.
Here, the moon is mostly full,
http://www.flickr.com/photos/johnhsiang/3847003433/
But here, the moon is only crescent shape,
http://www.flickr.com/photos/tomferris/3852706983/
Does the Pale Lady go through phases in the Worgen background? And if so, are they changing it in game as well?