Kuromukuro was first announced earlier this month as a collaboration between anime studio P.A. Works (Shirobako, Charlotte) and director/animator Tensai Okamura (Blue Exorcist, The Seven Deadly Sins). The project will celebrate the 15th anniversary of P.A. Works when it debuts in 2016. Joining director Okamura is Ryou Higaki (Another) on series composition and Yuriko Ishii (Another, A Lull in the Sea) on character design.
If your region has trouble with that one:
Among the cast members are Reina Ueda (Neyka in Blood Blockade Battlefront), M.A.O. (Mizuki Misawa in Samurai Flamenco), and Yōhei Azakami (Hiroshi-kun in Gakkatsu!). The official website is here, and more info is being posted on the official Twitter account.