Mortensen will star in "Todos tenemos un plan" (Everybody Has a Plan), the freshman effort of Argentina's Ana Piterbarg that will lense in May 2011 in Tigre, a delta region on the outskirts of Buenos Aires. It is a police caper about a man who takes on the identity of his deceased twin brother.
Haddock will produce the estimated E2.5 million ($3.2 million) pic with Spain's Tornasol Films and Castafiore Films.
This is a bigger budget film for Argentina, where the average is $1.5 million. And it would be hard to finance without Mortensen in the lead, especially in an environment of tight credit and rising costs, Haddock topper Vanessa Ragone told Variety.
"In terms of costs, we couldn't finance without presales, and you need a name for presales," she said.
Bortnik ("The Official Story") has boarded "Las Grietas de Jara," a drama also to lense next year.
She will co-write with Julia Solomonoff, who will direct the $1.9 million pic as her third feature following "Sisters" and "The Last Summer of La Boyita" in 2005 and 2009.
It is about a middle-aged architect whose humdrum life is shaken up when a young woman comes inquiring about the disappearance of a man.
"Las Grietas" is based on a novel by Claudia Pineiro, whose previous novel "Las Viudas de los Jueves" was turned into last year's B.O. hit "Thursday's Widows" by Haddock, Tornasol and Castafiore.
"Bortnik brings experience and lots of ideas about characters" to the project, Ragone said. "She is one of only a few writers who can adapt the novel so that it is not just a literal transcription but so that it can stand on its own as a film."