During preproduction, Michael Bay announced he would leak false information about the film, to keep fans guessing and reduce the risk of a leak being taken seriously in the midst of all the generated disinformation, and thus no one will truly have proper knowledge of the movie details.
Shooting started one day after Transformers (2007) won the MTV Movie Award for Best Movie.
Michael Bay considered making a small project in between Transformers (2007) and this film, but he "didn't want someone else to take his baby."
'Shia LaBeouf' had to take some time off filming due to a car crash in late July 2008. A hand injury he received from the crash was worked into the movie.
Matthew Marsden was a childhood fan of the Transformers comic books.
Screenwriter Ehren Kruger was signed on for his encyclopedic knowledge of the Transformers.
Used the fake working title of "Prime Directive" for casting calls/location booking -- the same title ruse used for the first Transformers film.