The controller has big buttons that light up, and measures 690x430x70mm. It’s also customizable; the display top can be swapped out for your own design. The controller is priced at ¥29,939 (about $361).
Hori is only going to start production on the controller if they get enough pre-orders, since it’s an expensive product. The pre-orders stop on March 22nd, so if you want one, order here.