Fan Casting The Transformers: Roll Out

A race of gigantic robots from a doomed planet find themselves fleeing to earth, where one of the tribes plans a hostile takeover. The second tribe of heroes set out to stop them, where they find out from two other talking vehicles that guarded "The Cube", a dangerous artifact, that their takeover on Earth is already in full-swing. Can these metallic heroes earn the trust of the Earth's humans and put a stop to the evil plans of Megatron?