Allegedly, an "employee" from a GameStop store in the US have taken photographs of Wii U Promotional Materials
to be displayed in-store. The pictures were exclusively leaked
onto a gaming site called sidequesting.com
It is now apparent that Nintendo
are sending out promotional materials to retailers as well as online stores. These were verified when local stores were enquired about it. Though no other significant details were uncovered such as released dates and pricing for the console at this stage.
Nintendo Wii U
Marketing materials pictures taken by an employee: