If you want all the specifics I can give you a link to the whole Transformers Script.. but I like secrets and surprises

After seeing this trailer I don't want to see or hear anything about the movie untill I get in the theater. It showed me that the movie will look stunning, it's got a few good actors and I trust the people behind the movie know what they're doing.

Michael Bay was the director for "The Island" "Pearl Harbor" and "Armageddon" which were all great movies. With Spielberg on the production team I don't see how this movie could turn out bad.

The only problem with the movies you mentioned is that the "monsters" can't talk. The Autobots are going to have dialog, so I bet they will show up pretty early in the movie and have a more central role.

The Transformers Movie probably wont be a Transformers geek's wet dream come true, but it will come pretty close. In order to appeal to more people they're going to have to base the movie on earth and there's going to have to be some human story, but I don't think they will let it overrun the movie. It looks like there's going to be multiple stories in different locations that will probably converge ala Independence Day.

The movie is in good hands, I'm not worried.