The Krupp's Bagger 228 is more than meets the eye. It is the world's largest digging machine, and it moves! If Michael Bay hasn't already ordered it up for the screenplay, he's not doing his job.
Paramount/DreamWorks, the studios behind the franchise, set the movie to premier in 2011. The director said he wants more time, and maybe take some time off. Maybe our hulking iron behemoth will get his creative juices flowing.
The gigantic machine has treads because driving it to its home in a German open-air coal mine was cheaper than having to ship the behemoth there. Couldn't they have just attached rockets and had it fly there like Optimus Prime? Bay will show them how!