Just a heads up, Walmart does have it for preorder. I know that wasn't your overall point, but I thought I'd put it out there.
I'm hoping it will get the Walmart discount in stores.
I looked earlier and my search only turned up older games from third party sellers, DVD's of the series, and some other random AA items. maybe it didn't show when i searched as it's listed as "Out of Stock"? I wonder if it's Out of Stock simply because it hasn't gone live yet for preorder?
Whatever the case, that's great news for those hoping for a deal. If I were still going after it, I'd wait for Walmart for that launch discount and be done... any sales beyond that will probably only be a few bucks at best and if you are a serious fan it's easier to just get a deal and be done than hope that it get's cheaper before selling out. If a few days after launch walmart didn't stock it in stores... then flip back and just get it from BB or Amazon.