Best Buy Lists "Dummy SKUs" for PS4,XBO,WIIU,PS3, and 3DS..

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Platina said:
If they are placeholders, then it seems a bit weird to only see 1 Wii U game announced at this year's E3..

 

EDIT: This might be for third party developers. Because I have a feeling if it was from Nintendo themselves, there would be a whole lot more than just one.