There has been no whispers that I know of yet. There is a lot of mystery in this stock but at this point there is also a lot of enthusiasm so there might be a nice rise into earnings. Beware that one little bad thing could shoot down a rally and holding through earnings is not a good way to trade. They'll catch you the wrong way every time.
Walmart bought a ton of advertising on Thanksgiving and day after. Gifts just started and could make Billions in a year and advertising mobile is taking off. I expect Q4 results to be 1.55 Billion, which would blow away the street..