A futuristic government sends a giant robot to break into a shielded island, that only machines can get through, to save the world from destruction.
The Animatrix
Superman: Red Son
Batman Ninja
Dragon Ball Z: Cooler's Revenge
Vexille
Superman: Man of Tomorrow
Starship Troopers: Invasion
Batman and Superman: Battle of the Super Sons
G.I. Joe: A Real American Hero
Ghost in the Shell: The New Movie