On to the second part. nelson, the site admin for director Michael Bay's Shoot for the Edit forums, chimed in on a topic about the BBFC information listed above. According to him the next trailer will not debut until mid to late April, which would debunk the previous list of potential trailer and TV spot dates that popped up last month. It tied the next trailer with Sucker Punch, which opens this Friday March 25th.
Originally Posted by nelson
Trailer will come around mid/late April.
Combine it all and it looks like we will be getting a PG rated 2 minute 18 second trailer in mid to late April. If you believe Bay's right hand man nelson and a site that listed Transformers DOTM director as Ivan Reitman that is.