Call it a mission undone. Paramount Pictures has postponed plans to film Mission: Impossible 3 as its 2005 blockbuster, and will instead release War of the Worlds, starring M:I star Tom Cruise and directed by Steven Spielberg. War, based on the H.G. Wells novel about a Martian invasion of Earth, will start production in November and be released some time next year. M:I-3 has been plagued with problems, including the exit of two directors. But don't fret, the movie isn't gone forever. The third installment of the action-packed spy adventure will resume production next summer, with Alias creator J.J. Abrams making his feature-film directorial debut.