Sounds simply like a bandwidth issue to me rather than "we hate Wii U". They have their engine running on PC, PS3 and 360 and are up to speed on all three of those platforms. They've got both Crysis 1 & 2 on all three platforms now so anyone on those platforms can play through the whole story (fractured and wacky as it is).
I'd argue it just doesn't make sense for them to put in the effort to bring the third entry in a franchise to Wii U - they're probably be much better served waiting to bring something new to Wii U at same time as other consoles at a later point.
If Wii U is powerful I'm sure they'll get their engine on it eventually but I suspect that betweem Crysis 3, their Kinect exclusive plus the other bits/bobs they're apparently working on their hands are already full.
Try to be reasonable... its easier than you think...
