The new original song is written/composed by Noriyasu Agematsu (Elements Garden) who has provided the OP songs for the three anime series that were also performed by Mizuki.
On September 15, Bushiroad and Pokelabo held a press conference for their upcoming smartphone game Senki Zessho Symphogear XD UNLIMITED inspired by Satelight’s Symphogear anime franchise.
No release schedule for a CD single of the song has been confirmed yet. for iOS and Android sometime in 2017.