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
Redline
Superman: Red Son
Superman: Man of Tomorrow
Vexille
Starship Troopers: Invasion
Batman and Superman: Battle of the Super Sons
Godzilla: Planet of the Monsters
G.I. Joe: A Real American Hero
Ghost in the Shell: The New Movie