I typed out the previous response before seeing this, and I have to agree with this part.

It may come up that they are just regional replacements, but a big part of what makes Walmart profitable is by buying in such vast bulk that companies have no choice but to lower the prices to an extreme. Unless Walmart gets soaked up by a similarly large company, which is unlikely because many of these big box stores (Target for ex) are suffering in a similar way at this time.