The following info comes from an IGN interview with Takashi Tezuka.
- title wasn't at E3 because more wasn't ready to be shown yet
- The reason Good Feel was chosen as the dev
"I looked at [Epic Yarn] and thought it was really beautiful. It seemed like it would be a good fit for Yoshi as well. We found that the Wii U would be able to make it a much more expressive game. It looked like it would be a lot of fun."
- Tezuka wants to add in more challenge than what was found in Kirby's Epic Yarn