This is a prime example of a chicken-or-the-egg scenario... but it's important to remember that Toyota's Prius is only getting its own variants after being on the market for nearly a decade.
With production back online, perhaps we will see a rebound in the low-volume sales the Volt witnessed through the month of June -- a month where it wasn't being made.
Such a move could help lower development costs of the Voltec program, though it does bring on the concern of just how much GM plans on distinguishing a Buick variant of the Volt from the Chevy.