Speaking on Late Night With Jimmy Fallon, the actor suggested that the film adaptation is "slated for the summer of 2012".
"[That] would mean that we'd have to start shooting in January," he explained. "We're moving everything towards accomplishing those dates."
Sutherland, who played federal agent Jack Bauer from 2001 to 2010, also confirmed that the movie will unfold as a "two-hour representation of a 24-hour day".
"What is really helpful for us, certainly from the writing point [of view], is that it won't be in real time," he said. "[Jack could] get on a plane to go somewhere. All of those things are possible now which were not possible in the show."
Former 24 producer Howard Gordon recently claimed that a movie version of the Fox drama is currently on hold.
A script for the film written by Flightplan scribe Billy Ray was rejected by Fox executives late last year.