The company has been testing comic book sales since January.
I don't actually live near a Walmart, but goodness knows the company is here to stay. Their prices are undeniably low, and in a lot of areas they're the only option. And now Walmart is testing a partnership with Marvel and Viz to set up a graphic novel section in some of their stores (via). Can you imagine getting your manga fix there? Rushing in on new comic book day?