User blog comment:ChishioKunrin/Is Monty answering fan theories?/@comment-10380701-20131111115535/@comment-10390252-20131111120348

I've had that theory since "Crimson's" first appearance. It fit in with a few things like Ozpin recognising Ruby's eyes, him going out on a limb to bring Ruby to Beacon years early, Ruby apparently being adopted or in a step-family and the fact that Monty kept Cinder in shadow. It was pretty close to a total Star Wars rip off though and I'm not entirely surprised that it hasn't played out.

Still, bits of it still seem to be the case such as Ozpin being aware of Cinder's activities and having plans for Ruby that seem to be connected with countering Cinder.