Thing is, on Wii, not only was there a much bigger install base for COD to sell to, but the console's hardware excused missing features. Nintendo gamers were sure that once they had a HD-capable console, they would finally get fair treatment and a high quality port.
But that didn't happen. Both Black Ops II and Ghosts on Wii U lacked DLC, (despite Treyarch promising it for the former) were not as optimized as they should have been, launched with a plethora of bugs, and in the case of BO2, had support cut a few months after launch.
I was active on the Wii U section of the official forums, and many, many people there either said that they weren't getting Ghosts because they were pissed off about how they were treated with Black Ops II, or that they would wait and see how others reported the port to be before buying.
Needless to say, when day 1 buyers such as myself reported texture bugs, freezing bugs, and performance dips,* many of them said "fuck it, not buying."
There was a potential market for COD on Wii U, but players were simply not satisfied with what they got.
*These issues have since been patched, but the damage was done as far as tainting the port's image.








