Call of Duty: Ghosts coming to Wii U, runs same next-gen engine as Xbox One and PS4 version

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superchunk said:

I doubt even Watch_Dogs will have much of a difference and it is using the same engine as well. In fact, I think these are the only games confirmed at this point to be using "next-gen" engines on all three next-gen hardware while PS360 are using different last-gen engines.

Source? I haven't heard Watch Dogs on Wii U will be using the PS4/X1 engine while PS3/360 won't.