Avalanche founder Christofer Sundberg said on Pressfire (via Escapist) that the Wii U's user base wasn't big enough to justify investing the company's time on Nintendo's console. "We actually had some development kits that just collected dust. It's a bit sad, because we wanted to do something. I think it is a cool platform, but right now it's not just up to us. We want the game to reach as many as possible."
He also added that he and his team had trouble communicating with Nintendo, saying that the company had always been difficult to reach. "You never quite know who to contact."
Avalanche Studios isn't the only developer expressing concerns for the console. DICE said that its Frostbite 3 engine did not produce promising results on the Wii U.