Filmmaker McG, who directed the upcoming fourth Terminator installment, Terminator Salvation, is working with Halcyon on a fifth film. There was no mention where the fifth film was to be shot, although the Middle East was mentioned as a filming possibility. When Derek Anderson and Victor Kubicek, the heads of Halcyon, acquired the rights the Terminator franchise last year, they said that they imagined the re-booted series as a trilogy. Christian Bale has signed on for the role of John Connor for all three films. The Terminator team originally wanted to wait until the release of Terminator Salvation in summer 2009 before moving ahead with a possible sequel, but the…