At least with the wii u any cod game can use the assets of the 360 and PS3 versions but running such games on the original wii was a huge programming effort and compromise. The PS3 and 360 are still very viable platforms and will be for a few years and hopefully the wii u will benefit from that. I'm hopeful the wii u will have a strong Christmas and go into 2015 as a stronger format. While the wii u would never justify the investment in a call of duty game on its own as a conversion from another similar format for additional profits for Activision it makes sense. Even if it only accounts for 3% of profits that is still profit.
The wii u is reliant on continued support for the 360 and PS3 though for multi-format titles I'm sure.








