There's an article on Seibertron.com (http://www.seibertron.com/transforme...poilers/29459/) with a description of the full trailer, which, providing it is accurate, would seem to spoil the bulk of the plot points. I don't remember the trailers of the other Bay films being quite so spoiler-y. I'm hoping the description is merely fan invention/speculation, otherwise, there's not likely to be many surprises left in the movie.