Overview
All-Star Superman is a 2011 American animated superhero film based on the comic book series of the same name by Grant Morrison and Frank Quitely. Released direct-to-video by Warner Bros. Animation on February 22, 2011, it is the tenth film of the DC Universe Animated Original Movies.
It is the first film in the series to not receive a PG-13 rating from the Motion Picture Association, instead being rated PG for “sequences of action and violence, language including brief innuendo, and some sensuality”. It is also one of the final projects by writer Dwayne McDuffie, releasing the day after his death.
Plot
Dr. Leo Quintum and his team are exploring the Sun when they are sabotaged by a booby-trapped genetically-enhanced time-bomb clone made by Lex Luthor. Superman stops the clone but in doing so receives an overdose of solar radiation; it has given him increased powers, but is slowly killing him. Luthor is arrested thanks to Clark Kent's article and sentenced to death.
Wanting to spend as much time as possible with Lois Lane, Superman reveals to her that he is Clark Kent, and takes her to the Fortress of Solitude. During this visit, Superman's secretive behavior and her indirect exposure to alien chemicals heightens Lois' paranoia. Superman is able to calm her, explaining his caginess was to hide her birthday present, a serum granting her superpowers for 24 hours. Now as Superwoman, she and Superman stop an attack by Subterranosauri led by Krull in Metropolis just as Samson and Atlas arrive. After the Subterranosauri are returned to the center of the Earth, Samson flirts with Lois and gives her a necklace, the crown jewels of the Ultra-Sphinx. When Superman tells him to back off, he challenges Superman to contests to win Lois. After the contests, Superman finally defeats Atlas and Samson in a double arm-wrestling match before spending the rest of the day with Lois as her powers fade.
From Wikipedia (CC BY-SA 4.0).