The world's most iconic super-heroes are united for an unbelievable adventure when Superman's greatest foe, Lex Luthor, becomes President of the United States and starts an all-out super-powered hunt for the Man of Tomorrow. Nearby in Gotham, Batman finds that Superman is not the last Kryptonian, as he discovers another survivor alive Kal-El s cousin, Supergirl! However, behind this immense discovery may be the gravest threat of all: Darkseid! Together, Superman and Batman square off with against the greatest threats known to the DC Universe in an unforgettable team-up!