Check out this email I just got from Mantic:

Kings of War is OUT OF STOCK!
The demand for Kings of War has been unprecedented and we have burned through all of our web and retailer allocation of the Kings of War 2nd Edition rulebooks, Counter Sets, Damage Trackers and a number of army sets.

We are getting more in very soon, and the items currently out of stock will remain on pre-order. Be first in line to get them as soon as they arrive, pre-order your Kings of War 2nd Edition rulebook here.

You can definitely see that GW has committed suicide with their idiotic decision to kill a beloved 30 year old IP. Someone else on the forums had a news bit about Mantic saying their website traffic had spiked over 300% since AoS came out.