Helmer McG, who directed the upcoming fourth pic, "Terminator Salvation," is working with the Halcyon duo on the latest project....says THIS REPORT in Variety. The gang had originally planned to see how TERMINATOR SALVATION performed at the box office before launching a fifth film. But...based on general response to SALVATION footage/trailers, etc...they're horny to get a fifth installment up and running at this time.