As previously reported, Mu-12 and Nu-13 will be in BlazBlue: Chrono Phantasma as playable characters, and Famitsu.com have released screenshots of both, along with descriptions of their movesets. You can take a look at the screens below.
Famitsu.com also have profiles for both Mu-12 and Nu-13, along with detailed write-ups of their moves. You can find more details on that front at Shoryuken.com, who have translated the move descriptions.
A doggy biscuit for Luna Kazemaru for the heads up!