I'm still trying to find evidence that it did end up getting released... and if it did, was there anything stuck onto the packaging to say MP-11A (for Acidstorm).
If it doesn't have something saying MP-11A, then it doesn't count as a "TakaraTomy Masterpiece" release... and even if it does have a label on it, it is still borderline. (a bit like calling the Ghost Starscream a Hasbro release, just because it showed up at our TRU stores)