During their E3 2015 conference, Square showed off the first ever look at their new NieR title that is still very early in development. How early is it? It's so early it doesn't even have a final name yet. The temporary name they're using for it is NieR New Project. No joke.
Offering a fresh blend of action and RPG gameplay styles, NieR New Project is currently being developed in collaboration with PlatinumGames Inc. exclusively for the PlayStation 4 computer entertainment system.

The game’s all-star development team consists of producer Yosuke Saito (DRAGON QUEST X / NieR), director YOKO TARO (Drakengard / NieR), character designer Akihiko Yoshida from CyDesignation, Inc. (FINAL FANTASY XIV / BRAVELY DEFAULT), game designer Takahisa Taura from PlatinumGames Inc. (Metal Gear Rising: Revengeance), and composer Keiichi Okabe from MONACA, Inc. (TEKKEN / Drakengard / NieR). PlatinumGames Inc. will be amplifying the action-oriented combat and building a beautifully diverse visual experience that will fully harness the graphical power of the PlayStation 4 system.

A few bits of concept art were released along with a few "screens" and a new trailer reveal.