Possibly.

Are there even any driving wheels that are compatible with the wii u?

Doubtful seeing as how these shots are 1080p and above so if anything these are either PC or current gen (PS4/X1) consoles.

When is this game gonna come out

Like a Gaffer has pointed out, some parts are simply too ugly for a PC, PS4 or X1 version:

As has already been pointed out, they're above 720p, so no.

I'm starting to suspect we might be facing a Wii/Wii U COD situation, where we won't see what it looks like until it launches.

It's not like support can't be added in-game (GT5 had game support for wheels).  There will be a gyro steering function aswell. 

Has the developer said there will be any support for wheels on Wii U though? Gyro steering is not the same at all.

Had no confirmation for any platform other than what we know on PC. I know some other wheels are compatible with the Wii. Gyro can be good, if tuned right

Where'd you even get the idea it would be the Wii U version? Being really optimistic because it looks way to good to be Wii U.