Area 57 is the name of a pilot produced for the 2007/2008 season for NBC. It centers on an Area 51-esque military base and the alien it houses. The pilot was not picked up.
Rick and Morty
My Love from the Star
M*A*S*H
Kill la Kill
Too Cute Crisis
Monsters vs. Aliens
Space Dandy
Bravest Warriors
Steven Universe Future
No Choice But to Betray the Earth!
Mystery Science Theater 3000
Assassination Classroom