Jeffrey Dean Morgan (“Watchmen”) will star alongside Sam Worthington in murder mystery “The Fields,” with Michael Mann producing along with Michael Jaffe.Morgan will star as a detective transplanted from New York, while the “Avatar” thesp will portray a local investigator probing a series of unsolved murders in industrial wastelands surrounding Gulf Coast refineries, where as many as 70 bodies have turned up over the past two decades. Together they wage a war against the unknown assailants. “The Fields” — which was originally called “Texas Killing Fields” — will be directed by Ami Canaan Mann, daughter of Michael Mann, in a co-production between Bill Block’s QED Intl. and Mann’s Forward Pass shingle. Screenplay’s by former DEA agent Donald F. Ferrarone. Production is scheduled to begin April 5 in Louisiana. Morgan will be seen next in Warner Bros.’ “The Losers,” an adaptation of the DC-Vertigo comicbook, as the leader of a group of black-ops commandos betrayed by their own government. “The Losers,” originally set for April 9, was moved to June 4 last week and now has been moved again, this time to April 23. Morgan’s also starring as a landlord opposite Hilary Swank in Hammer Films’ thriller “The Resident” and in MGM’s remake of “Red Dawn,” slated for release on Nov. 24.