Watchmen: The IMAX Experience (2009)

"Watchmen" is set in an alternate 1985 America in which costumed superheroes are part of the fabric of everyday society, and the "doomsday clock" - which charts the USA's tension with the Soviet Union - is permanently set at five minutes to midnight. When one of his former colleagues is murdered, the washed up but no less determined masked vigilante Rorschach sets out to uncover a plot to kill and discredit all past and present superheroes.

Official website: http://www.watchmenmovie.com.au