HORI, a Japanese gaming accessories manufacturer, has just announced a whole slew of Wii U accessories in Japan.  HORI is best known for their protective gaming accessories, such as screen protectors.  As a matter of fact, my 3DS has HORI screen protectors and they work very well.  Below you can see the complete array of products that HORI announced for release in Japan.  I would hope that they also plan to bring most of these products to the US.  Considering that their products are fairly popular here and I would love to have some of these for my Wii U when I go and pick it up on launch day.  These images are of products in development and could change from what you are seeing here but for the most part Japanese consumers can expect that a majority of these will probably make it to retailers.