The point of the G1 Masterpiece line is to update G1 toys with modern engineering. For Takaratomy to make what will be essentially a third party ripoff of the Astro Magnum mould would be similar to the same company making an accurate-looking Masterpiece Cy-Kill or Masterpiece Jetfire even though the original Bike Robo/Valkyrie moulds, patents and designs are owned by Bandai. Takara's Laserwave toys have never turned into anything that resembled Shockwave's altmode and even the upcoming Generations toy doesn't turn into a gun. There is no way that they'd be going headstrong into making a G1-accurate Shockwave without someone in the legal department going "um..." or "no".