‘Retroman’ tells us production sources (here, here and here) reveal the crew members of the Fantastic Four sequel. They also indicate that Bill Boes has been replaced with Ghost Rider production designer Kirk Petruccelli:
Shooting: 8/15/2006 – 12/31/2006
Production Manager: Stewart Bethune
Casting: Coreen Mayrs, Heike Brandstatter
Background casting: Andrea Brown
Production Coordinator: Melissa Barrie
Location Manager: Ann Goobie
Production Designer: Kirk Petruccelli
First assistant director: Lee Cleary
Second assistant director: David Arnold
They are set up at the Vancouver Film Studios.
Source: Retroman
