Maybe It's Okay to Repeat History

After Dr. O'Neil destroyed Project Renaissance, Sachs desperately repeated the experiment on female turtles. The project failed, and Sonia, Cecilia, Emilie and Anna were forced to grow up hidden from society. Years later they are on the run from Sachs, and they arrive in New York where they meet the other "victims" of the mutagen. 2014 universe, Turtles x OCs