Ninja Gaiden Σ 2 has been dated for Japan. Here are details about the ¥9,980 (US$104) Premium Box.
https://kotaku.com/ninja-gaiden-sigma-2-dated-and-detailed-for-japan-452585722
It includes a soundtrack CD, an original accessory set and a special sleeve. Those who pre-order can get a “Starter Set” that includes a Ninja Gaiden guide book.
