Marvel's Biggest Cast Assemble for 'Avengers: Infinity War'

The evil villain Thanos is preparing to take over the universe and Marvel has recruited all of its cinematic superheroes, from Iron Man and Thor to Doctor Strange and Spider-Man, to save the galaxy in Wednesday's new trailer for "Avengers: Infinity War." The film, due in theaters in May 2018, will see the biggest gathering of Walt Disney Co.-owned Marvel's fast-expanding cadre of cinematic superheroes, including Doctor Strange, Black Panther and the Guardians of the Galaxy.