Head canon accepted.

>A deleted subplot from the film showed the Iron Giant being built by aliens as a nuclear deterrent (sound familiar?)
>The comic is published by DC despite owning neither
>My theory? Kryptonians built the Transformers. The war between Autobots and Decepticons resulted in the destruction of the planet, forcing Transformers to flee.
>Iron Giant and Megatron were the first to land on Earth – Megatron frozen in ice as depicted in the first Transformers film and Iron Giant during the 1950s