This issue is a variant of Avengers Assemble (Marvel, 2012 series) #1. There exist further variants.
This variant was one of several retailer exclusives for this issue that prominently promoted individual outlets. Two customized cover styles were distributed amongst several stores and conventions; one by Mirco Pierfederici and the other by Khoi Pham. A minimum print run of 500 copies, but possibly more according to individual retailer orders, exist for each custom promo variant.