Toransufooma: Za Muubi– Chiiza Toreira Desu!
Or, if you're not Japanese, "astf: The Teaser Trailer!" This Youtube video features Stephen Spielberg and Michael Bay introducing to the people of Japan a newly cut trailer featuring a view of Bumblebee's face, sans battle mask, and a shot from the rear of Scorponok. You can thank Warpscream for bringing us the news. Click "Read More" to view the video.
UPDATE! Thanks to Type-Q, we now have access to the teaser in non-Youtube quality, here at the official Japanese site.