Are they hiding in plain sight? Here's what happened to the original cast.Megan Fox as Mikaela Barnes and Shia LaBeouf as Sam Witwicky in 'Transformers'Credit: Paramount/Courtesy EverettMichael Bay helped usher in a new era of Hollywood filmmaking in 2007. Transformers, the first live-action adaptation of the classic '80s toy line, was a massive box-office smash thanks in part to its photorealistic visual effects and thrilling action sequences. …