NieR: Automata is in development at PlatinumGames and it's slated to arrive later this year.
It's probably a bigger deal in Japan than it is here, though, which is why there was entire event dedicated to the upcoming game at the EX Theater in Roppongi, Tokyo.
And from that NieR Music Concert & Talk Live event (possibly a wonky translation there), we've got some new game footage and live music performances, courtesy of DualShockers . The trailer shows off a couple new characters; A2: YoRHa Type A NO. 2 and 9S: YoRHa No. 9 Type S. These will be featured alongside the apparent protagonist, B2: YoRHa No. 2 Type B, who we've seen before. A lot of numbers and letters that don't mean much but then again, we're really not expecting a stellar narrative. This will be more about action and besides, it's Platinum. They're awesome but not when it comes to story.
Related Game(s): NieR: Automata