A picture has been circulating around the internet which shows mock-up boxes for Donkey Kong 3D, supporting claims that Nintendo are working on a new title for their mascot.
After contacting EB Games, a representative explained that there is no Stock-Keeping Unit (SKU) for Donkey Kong 3D. What this means is that when a pre-order takes place, the receipt the customer takes will include the SKU of the product. No SKU, no pre-order. The representative also could not name a store location which would have these boxes on display.
This is very much in the rumour department for now. It would not be surprising for Nintendo to be releasing a Donkey Kong title for the 3DS, after the success of Donkey Kong Country Returns on the Nintendo Wii.