His head design in robot mode was the same as the "bucket head" of G1 Megatron, and his T.rex head was used as a sort of blaster paying homage to the classic Megatron fusion cannon. Likewise ...

Shockwave's Energon Universe alt-mode is revealed as a laser pistol, just like his most classic incarnation; readers have already taken this as a hint that Megatron could return to his G1 alt-mode ...