Update: Slightly Mad Studios has released another statement, which can be viewed below, after the initial statement.
Back in May we learned that
the Wii U version of Project CARS was in serious trouble. Developer Slightly Mad Studios had been working on the game for a long time, but they couldn’t get it above 720p and a dreadful 23 frames per second. At the time, they stated that they were hoping for an official NX reveal at E3 so they could begin working on better hardware, but that didn’t happen. Studio head Ian Bell has now confirmed what many had feared: Wii U can’t handle Project CARS. Slightly Mad still intends to bring the game to Nintendo’s next home console, but Wii U is out.
“The official line is that we’re awaiting an announcement from Nintendo on new hardware. As of now pCARS is simply too much for the Wii U.”
— Ian Bell
“Despite much perseverance on the Wii U version of Project Cars, we will no longer be actively pursuing development on it as the quality does not meet our own high standards nor our intended vision for the title on this platform.
“We eagerly look forward to any announcement of further hardware from Nintendo but right now Project Cars is simply too much for Wii U despite our very best efforts. Apologies to our Nintendo fans out there that have been waiting for further news on this but we have no desire to release a product that isn’t at the very least comparable with our highest-rated versions on other platforms. We optimistically look forward therefore to what the future may hold.”
— Andy Tudor
Project CARS is performing well on PlayStation 4, Xbox One, and PC, but the Xbox 360, PlayStation 3, and Wii U versions all had to be dropped. The latter is particularly unfortunate, as many donated funds to the game’s development in hopes of it releasing on Wii U.
Source: Nintendo Life