At a concert yesterday, Nana announced she will be singing the opening song for the upcoming season Symphogear AXZ. She also gave some details on the single release.
On July 19th she will release 2 new single CDs. The included songs are not yet named but will be the theme songs for Symphogear AXZ and Nanoha Reflection. As usual there will probably be a regular edition and a special edition for sale. I will post more details as soon as they are made available.