Just throwing it out there, not sure if there's anything new, but someone might find it useful.
More worlds and skins will be added in a future update, but not this/next month
The team working on SAB joined the Living Story team
The soundtrack might be released on iTunes later
SAB will be removed in May, but it'll come back later with World 2
The top 3 most requested / most prioritized skins are dagger, rifle and pistol, in that order
TL;DR The box will go in May, back with more maps and stuff in June / later.