We all knew Novalogic was working on a new title,
rumored to be The Unit: Operation Acid Gambit, based on the TV series, but that seems to have been abandoned by now. Last we heard Novalogic bought a motion capture unit from PhaseSpace for its game development. While details are currently non-existant, a teaser image does reveal a first clue as to its possible setting, the background shows an faint outline of South America. There should be more details soon, as DF: BO is scheduled for 2008.
UPDATE: Seems Novalogic is either keeping us guessing or has changed the name to Delta Force: Angel Falls, possibly due to a conflict with a pre-existing Black Ops mod. Angel Falls is a brand of Venezuelan coffee, fits with the South America setting.