The leaked images show the toy version of both the robot and vehicle form of Shockwave. Apparently, Shockwave transforms into a Cybertronian tank and it looks similar to Megatron tank form back in Revenge of the Fallen. I like the robot form of Shockwave, it looks cool and maintains some reference of his appearance in G1 (purple color, big gun on his arm, cyclops eye, horns). His tank mode is a little bulky though.
All images shown are courtesy of ACToys.
Prime: Looks like a bad-a$$ villain...