As I rewatched for ANOTHER time My Crazy Beautiful Life i noticed that all the music in the series is by Dr. Luke( he's the music director) and heard some really good productions. In one of them i think you can hear Kesha's backvocals (skip to 06:03). Also watching the making of Warrior i realised that some of the instrumentals for it were ready and Kesha wrote her songs over them. So do you think we might have heard some instrumentals of hwe new album like we heard the Ghost instrumental 1 year ago ?

doubt it

They are less than 12 months old though
She had already been working on her third album at this point.

Not saying that it's gonna be on the album, but they are no way old. Lots of the songs on most pops girls albums are years old before you hear them.

Songs from Unapologetic for example, were put on hold before Talk That Talk was even released.