“Dark Blood,” River Phoenix’s final film, will get its North American premiere as part of this year’s Miami Intl. Film Festival.Although it’s estimated that 80% of the film was completed when Phoenix died in 1993, “Dark Blood” sat unscreened for nearly 20 years until helmer George Sluizer bowed a new version, with missing bits filled in through narration and production stills, as part of the Netherlands Film Festival last year. Storyline follows a vacationing Hollywood couple, played by Jonathan Pryce and Judy Davis, whose car breaks down in the desert, where they fall into the clutches of an unstable loner portrayed by Phoenix. Complete lineup for the Miami fest has yet to be set, although titles including Fernando Trueba’s “The Artist and the Model” and Carlos Lechuga’s “Molasses” are among the offerings already announced. The 30th annual Miami Intl. Film Festival runs March 1-10, with a full slate to be announced later this month.