Filming is expected to start later this year for a release on June 29, 2014 and so far it appears that none of the original human cast members are set to return.
While the new movie is expected to be a sequel to last year’s Transformers 3 - Dark of the Moon, the fourth highest global grossing film of all time with $1.124 billion of worldwide box office success, it will be a more serious film, with less of the jokes and hopefully more action.
We don’t have any more solid details but according to the guys at Autoblog a script is yet to be written so anything could change before the movie's release. You can bet Optimus Prime and Bumblebee will be back, but what’s not clear is whether General Motors will sign on again as its contract with the Transformers franchise was for only three movies.
Stay tuned for an update as work on the project progresses.