Tater:
The skin pack release is independent from the new vehicles release (which won't be for a while -- the B-25 is next and they haven't even started it yet). One requires all the work be one by HTC, the other has all the work already done (the skins) and needs only be reviewed/checked and packaged for download.
Also, IMO, the reason they keep doing this:
is because it pushes (bumps) the thread back into easy view, so those at HTC can see it, and be subtly reminded "oh, yeah, they're still waiting on that skin pack" -- whether that works or is a waste of time I've no clue.
The skinners have been waiting 6months (more, now!) for word on the skins we've been submitting this entire time. There are a lot of choice skins in the upcoming release, that several folks have been looking forward to. I, personally, would love to see if "God of War" made it in or not.