Don Murphy was the most forthcoming with information, describing the structure of the film as a disaster movie where five separate storylines converge at the end of the movie into one epic battle. The street scene we witnessed was integral to the final confrontation. He also stated that the "transforming sound" is likely to make it into the film, and that although the timing does not yet call for it, they are definitely looking into getting Frank Welker to voice Megatron. At Comic-Con 2006, the studio announced that the fan favorite and original actor who did Optimus Prime will be voicing the Autobot leader in the film. Murphy went on to say that Soundwave is being saved for a possible sequel, and he will play a large role in the proceedings.
My initial thought is that it would be really funny to get this Optimus helmet and a Darth Vader voice changer helmet and start a nerdcore rap group. YouTube stardom is just around the corner!
HEY!! Who never told me Megan Fox was in the MOVIE!?!