Please note that ALL release dates are estimates only, not official dates.
None of them are official words from Apogee, 3D Realms, or Pinball Wizards.
The official release date for all games is "when it's done."

      
From 3D Realms:

 Game                             Genre             Estimated Release Date
 ----                             -----             ----------------------
 Duke Nukem Forever               3D Action         "when it's done"
}Prey                             3D Action         2006 (or "when it's done")