Get ready, folks, because there is a new Oreo flavor hitting shelves Oct. 9. Instagram user @TheJunkFoodAisle posted what appears to be a mock-up of an Oreo package labeled "Mystery Oreos." This may be the winning flavor from the My Oreo Creation contest, but Oreo may also make us guess what it is! Could it possibly be one of the flavors that Oreo created prototypes of, below? We're anxiously waiting to find out if this is how Oreo plans to reveal the best fan submission or if it's simply another new Oreo Wonder Vault creation.