NieR Meets FF14... YoRHa: Dark Apocalypse

“He also selected what kind of characters he wants to bring from the NieR world to FFXIV, and that means that you can expect the appearance of NieR characters, so you can look forward to that.
According to the article it should be announced pretty soon too:

Luckily, we don’t have to wait much longer before we learn more about YoRHa: Dark Apocalypse. A reveal is coming at Tokyo Game Show, where both Yoko Taro and Yosuke Saito will be in attendance.