Wal Mart is now honoring the pricing error! Just got this email:
"You recently received an email from us that your order of Iron Man 2 (Blu-ray + Standard DVD + Digital Copy) (Widescreen) had been cancelled due to a limited supply issue. The cancellation was due to a pricing error on this item, not a supply issue. We're sorry for the confusion and the inconvenience.
To thank you for your understanding, we will honor the $15 price that was displayed at the time of your purchase. We will email you a $10.56 eGift Card to cover the difference from the current price of $24.96 plus tax. Your eGift card will be emailed within the next 24 hours and can be applied towards the purchase of this item or a different item. We’ll issue one eGift Card per affected customer; this card can be used online at Walmart.com only."