Or perhaps they're replicants.
I can see it now, in Episode 3: The clone soldiers that featured so prominently in Ep 2 have transmogrified into an endless, unstoppable army of faceless stormtroopers. Anakin leads them, confident that, as the Chosen One and with great Force powers, he is far above the replicants he uses to fulfil his plans, who aren't even human. In the middle of the film, he has a strange, disturbing dream where he sees a unicorn running in a field. He shrugs this off, but the scene gains its true meaning at the film's conclusion, where we see Palpatine toying with an origami sculpture of a unicorn. The clear implication is that Anakin/Vader, like the stormtroopers he leads, is also a replicant.
It'll make millions.