Wii U version of Project CARS facing troubles, likely cancelled

[Miyamotoo]

Real problem here is that they hope that Nintendo will announce new console at E3, and then they move project to new console.
Wii U version is currently on a hold because of that.

http://www.nintendolife.com/news/2015/05/project_cars_studio_boss_admits_to_problems_with_wii_u_version_hoping_for_nintendo_hardware_announcement_at_e3