According to the veteran designer, "over 100" staff from the firm are chipping in to ensure the forthcoming Wii U and NX title is as good as it possibly can be:
Yes they are involved in this Zelda. People from Tokyo and Kyoto are working together on this. There is a team of over 100 helping work on this project, and their work has really been helpful.
This isn't an unusual practice for Monolith Soft, which previously helped out on The Legend of Zelda: Skyward Sword.
Given the incredible size and scope of this latest Zelda outing, it makes perfect sense for Nintendo to pool its resources and get extra hands on deck. All of this additional effort should hopefully ensure that come 2017, we'll be playing one of the most impressive entries in the series yet seen.