UPDATE - More evidence here.
Between the Wii U basic and premium bundles, the premium version has been seeing a lot of love. It seems that most just don't want the basic bundle, and Nintendo might be picking up on that. Rumor has it that retailers are getting company-wide emails saying to recall the basic bundle. This could pave the wave for a new bundle due out the door soon, and could also signify the death of the basic bundle.